Color management system - base classes + settings

PdfForQtLib/PdfForQtLib.pro

@@ -39,6 +39,7 @@ SOURCES += \
     sources/pdfaction.cpp \
     sources/pdfblendfunction.cpp \
     sources/pdfccittfaxdecoder.cpp \
+    sources/pdfcms.cpp \
     sources/pdfcompiler.cpp \
     sources/pdffile.cpp \
     sources/pdfitemmodels.cpp \
@@ -77,6 +78,7 @@ HEADERS += \
     sources/pdfaction.h \
     sources/pdfblendfunction.h \
     sources/pdfccittfaxdecoder.h \
+    sources/pdfcms.h \
     sources/pdfcompiler.h \
     sources/pdffile.h \
     sources/pdfitemmodels.h \
@@ -174,6 +176,16 @@ zlib.files = $$PDFFORQT_DEPENDENCIES_PATH/zlib/bin/zlib.dll
 zlib.path = $$DESTDIR/install
 INSTALLS += zlib
 
+# Link lcms2
+LIBS += -L$$PDFFORQT_DEPENDENCIES_PATH/lcms2/bin/ -llcms2
+INCLUDEPATH += $$PDFFORQT_DEPENDENCIES_PATH/lcms2/include
+DEPENDPATH += $$PDFFORQT_DEPENDENCIES_PATH/lcms2/include
+
+# Add lcms2 to installations
+lcms2.files = $$PDFFORQT_DEPENDENCIES_PATH/lcms2/bin/lcms2.dll
+lcms2.path = $$DESTDIR/install
+INSTALLS += lcms2
+
 # ensure debug info even for RELEASE build
 CONFIG += force_debug_info
 

PdfForQtLib/sources/pdfcms.cpp

@@ -0,0 +1,219 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt 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 Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt.  If not, see <https://www.gnu.org/licenses/>.
+
+#include "pdfcms.h"
+
+#pragma warning(push)
+#pragma warning(disable:5033)
+#include <lcms2.h>
+#pragma warning(pop)
+
+namespace pdf
+{
+
+bool PDFCMSGeneric::isCompatible(const PDFCMSSettings& settings) const
+{
+    return settings.system == PDFCMSSettings::System::Generic;
+}
+
+QColor PDFCMSGeneric::getColorFromDeviceGray(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const
+{
+    Q_UNUSED(color);
+    Q_UNUSED(intent);
+    Q_UNUSED(reporter);
+    return QColor();
+}
+
+QColor PDFCMSGeneric::getColorFromDeviceRGB(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const
+{
+    Q_UNUSED(color);
+    Q_UNUSED(intent);
+    Q_UNUSED(reporter);
+    return QColor();
+}
+
+QColor PDFCMSGeneric::getColorFromDeviceCMYK(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const
+{
+    Q_UNUSED(color);
+    Q_UNUSED(intent);
+    Q_UNUSED(reporter);
+    return QColor();
+}
+
+QColor PDFCMSGeneric::getColorFromXYZ(const PDFColor3& whitePoint, const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const
+{
+    Q_UNUSED(color);
+    Q_UNUSED(intent);
+    Q_UNUSED(reporter);
+    Q_UNUSED(whitePoint);
+    return QColor();
+}
+
+PDFCMSManager::PDFCMSManager(QObject* parent) :
+    BaseClass(parent)
+{
+
+}
+
+const PDFColorSpaceIdentifiers& PDFCMSManager::getOutputProfiles() const
+{
+    QMutexLocker lock(&m_mutex);
+    return m_outputProfiles.get(this, &PDFCMSManager::getOutputProfilesImpl);
+}
+
+const PDFColorSpaceIdentifiers& PDFCMSManager::getGrayProfiles() const
+{
+    QMutexLocker lock(&m_mutex);
+    return m_grayProfiles.get(this, &PDFCMSManager::getGrayProfilesImpl);
+}
+
+const PDFColorSpaceIdentifiers& PDFCMSManager::getRGBProfiles() const
+{
+    QMutexLocker lock(&m_mutex);
+    return m_RGBProfiles.get(this, &PDFCMSManager::getRGBProfilesImpl);
+}
+
+const PDFColorSpaceIdentifiers& PDFCMSManager::getCMYKProfiles() const
+{
+    QMutexLocker lock(&m_mutex);
+    return m_CMYKProfiles.get(this, &PDFCMSManager::getCMYKProfilesImpl);
+}
+
+PDFCMSSettings PDFCMSManager::getDefaultSettings() const
+{
+    PDFCMSSettings settings;
+
+    auto getFirstProfileId = [](const PDFColorSpaceIdentifiers& identifiers)
+    {
+        if (!identifiers.empty())
+        {
+            return identifiers.front().id;
+        }
+        return QString();
+    };
+
+    settings.system = PDFCMSSettings::System::LittleCMS2;
+    settings.outputCS = getFirstProfileId(getOutputProfiles());
+    settings.deviceGray = getFirstProfileId(getGrayProfiles());
+    settings.deviceRGB = getFirstProfileId(getRGBProfiles());
+    settings.deviceCMYK = getFirstProfileId(getCMYKProfiles());
+
+    return settings;
+}
+
+QString PDFCMSManager::getSystemName(PDFCMSSettings::System system)
+{
+    switch (system)
+    {
+        case PDFCMSSettings::System::Generic:
+            return tr("Generic");
+
+        case PDFCMSSettings::System::LittleCMS2:
+        {
+            const int major = LCMS_VERSION / 1000;
+            const int minor = (LCMS_VERSION % 1000) / 10;
+            return tr("Little CMS %1.%2").arg(major).arg(minor);
+        }
+
+        default:
+        {
+            Q_ASSERT(false);
+            break;
+        }
+    }
+
+    return QString();
+}
+
+PDFColorSpaceIdentifiers PDFCMSManager::getOutputProfilesImpl() const
+{
+    // Currently, we only support sRGB output color profile.
+    return { PDFColorSpaceIdentifier::createSRGB() };
+}
+
+PDFColorSpaceIdentifiers PDFCMSManager::getGrayProfilesImpl() const
+{
+    // Jakub Melka: We create gray profiles for temperature 5000K, 6500K and 9300K.
+    // We also use linear gamma and gamma value 2.2.
+    return {
+        PDFColorSpaceIdentifier::createGray(tr("Gray D65, γ = 2.2"), "@GENERIC_Gray_D65_g22", 6500.0, 2.2),
+        PDFColorSpaceIdentifier::createGray(tr("Gray D50, γ = 2.2"), "@GENERIC_Gray_D50_g22", 5000.0, 2.2),
+        PDFColorSpaceIdentifier::createGray(tr("Gray D93, γ = 2.2"), "@GENERIC_Gray_D93_g22", 9300.0, 2.2),
+        PDFColorSpaceIdentifier::createGray(tr("Gray D65, γ = 1.0 (linear)"), "@GENERIC_Gray_D65_g10", 6500.0, 1.0),
+        PDFColorSpaceIdentifier::createGray(tr("Gray D50, γ = 1.0 (linear)"), "@GENERIC_Gray_D50_g10", 5000.0, 1.0),
+        PDFColorSpaceIdentifier::createGray(tr("Gray D93, γ = 1.0 (linear)"), "@GENERIC_Gray_D93_g10", 9300.0, 1.0)
+    };
+}
+
+PDFColorSpaceIdentifiers PDFCMSManager::getRGBProfilesImpl() const
+{
+    // Jakub Melka: We create RGB profiles for common standars and also for
+    // default standard sRGB. See https://en.wikipedia.org/wiki/Color_spaces_with_RGB_primaries.
+    return {
+        PDFColorSpaceIdentifier::createSRGB(),
+        PDFColorSpaceIdentifier::createRGB(tr("HDTV (ITU-R BT.709)"), "@GENERIC_RGB_HDTV", 6500, QPointF(0.64, 0.33), QPointF(0.30, 0.60), QPointF(0.15, 0.06), 20.0 / 9.0),
+        PDFColorSpaceIdentifier::createRGB(tr("Adobe RGB 1998"), "@GENERIC_RGB_Adobe1998", 6500, QPointF(0.64, 0.33), QPointF(0.30, 0.60), QPointF(0.15, 0.06), 563.0 / 256.0),
+        PDFColorSpaceIdentifier::createRGB(tr("PAL / SECAM"), "@GENERIC_RGB_PalSecam", 6500, QPointF(0.64, 0.33), QPointF(0.29, 0.60), QPointF(0.15, 0.06), 14.0 / 5.0),
+        PDFColorSpaceIdentifier::createRGB(tr("NTSC"), "@GENERIC_RGB_NTSC", 6500, QPointF(0.64, 0.34), QPointF(0.31, 0.595), QPointF(0.155, 0.07), 20.0 / 9.0),
+        PDFColorSpaceIdentifier::createRGB(tr("Adobe Wide Gamut RGB"), "@GENERIC_RGB_AdobeWideGamut", 5000, QPointF(0.735, 0.265), QPointF(0.115, 0.826), QPointF(0.157, 0.018), 563.0 / 256.0),
+        PDFColorSpaceIdentifier::createRGB(tr("ProPhoto RGB"), "@GENERIC_RGB_ProPhoto", 5000, QPointF(0.7347, 0.2653), QPointF(0.1596, 0.8404), QPointF(0.0366, 0.0001), 9.0 / 5.0)
+    };
+}
+
+PDFColorSpaceIdentifiers PDFCMSManager::getCMYKProfilesImpl() const
+{
+    return {
+
+    };
+}
+
+PDFColorSpaceIdentifier PDFColorSpaceIdentifier::createGray(QString name, QString id, PDFReal temperature, PDFReal gamma)
+{
+    PDFColorSpaceIdentifier result;
+    result.type = Type::Gray;
+    result.name = qMove(name);
+    result.id = qMove(id);
+    result.temperature = temperature;
+    result.gamma = gamma;
+    return result;
+}
+
+PDFColorSpaceIdentifier PDFColorSpaceIdentifier::createSRGB()
+{
+    PDFColorSpaceIdentifier result;
+    result.type = Type::sRGB;
+    result.name = PDFCMSManager::tr("sRGB");
+    result.id = "@GENERIC_sRGB";
+    return result;
+}
+
+PDFColorSpaceIdentifier PDFColorSpaceIdentifier::createRGB(QString name, QString id, PDFReal temperature, QPointF primaryR, QPointF primaryG, QPointF primaryB, PDFReal gamma)
+{
+    PDFColorSpaceIdentifier result;
+    result.type = Type::RGB;
+    result.name = qMove(name);
+    result.id = qMove(id);
+    result.temperature = temperature;
+    result.primaryR = primaryR;
+    result.primaryG = primaryG;
+    result.primaryB = primaryB;
+    result.gamma = gamma;
+    return result;
+}
+
+}   // namespace pdf
+

PdfForQtLib/sources/pdfcms.h

@@ -0,0 +1,225 @@
+//    Copyright (C) 2019 Jakub Melka
+//
+//    This file is part of PdfForQt.
+//
+//    PdfForQt is free software: you can redistribute it and/or modify
+//    it under the terms of the GNU Lesser General Public License as published by
+//    the Free Software Foundation, either version 3 of the License, or
+//    (at your option) any later version.
+//
+//    PdfForQt 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 Lesser General Public License for more details.
+//
+//    You should have received a copy of the GNU Lesser General Public License
+//    along with PDFForQt. If not, see <https://www.gnu.org/licenses/>.
+
+#ifndef PDFCMS_H
+#define PDFCMS_H
+
+#include "pdfglobal.h"
+#include "pdfcolorspaces.h"
+#include "pdfexception.h"
+#include "pdfutils.h"
+
+#include <QMutex>
+
+#include <compare>
+
+namespace pdf
+{
+
+/// This simple structure stores settings for color management system, and what
+/// color management system should be used. At default, two color management
+/// system are available - generic (which uses default imprecise color management),
+/// and CMS using engine LittleCMS2, which was written by Marti Maria, and is
+/// linked as separate library.
+struct PDFCMSSettings
+{
+    /// Type of color management system
+    enum class System
+    {
+        Generic,
+        LittleCMS2
+    };
+
+    /// Controls accuracy of the color transformations. High accuracy
+    /// could mean high memory consumption, but better color accuracy,
+    /// low accuracy means low memory consumption and low color accuracy.
+    enum class Accuracy
+    {
+        Low,
+        Medium,
+        High
+    };
+
+    bool operator==(const PDFCMSSettings&) const = default;
+
+    System system = System::Generic;
+    Accuracy accuracy = Accuracy::Medium;
+    RenderingIntent intent = RenderingIntent::Auto;
+    bool isBlackPointCompensationActive = true;
+    bool isWhitePaperColorTransformed = false;
+    QString outputCS;       ///< Output (rendering) color space
+    QString deviceGray;     ///< Identifiers for color space (device gray)
+    QString deviceRGB;      ///< Identifiers for color space (device RGB)
+    QString deviceCMYK;     ///< Identifiers for color space (device CMYK)
+};
+
+/// Color management system base class. It contains functions to transform
+/// colors from various color system to device color system. If color management
+/// system can't handle color transform, it should return invalid color.
+class PDFCMS
+{
+public:
+    explicit inline PDFCMS() = default;
+    virtual ~PDFCMS() = default;
+
+    /// This function should decide, if color management system is compatible with these
+    /// settings (so, it transforms colors according to this setting). If this
+    /// function returns false, then this color management system should be replaced
+    /// by newly created one, according these settings.
+    virtual bool isCompatible(const PDFCMSSettings& settings) const = 0;
+
+    /// Converts color in Device Gray color space to the target device
+    /// color space. If error occurs, then invalid color is returned.
+    /// Caller then should handle this - try to convert color as accurate
+    /// as possible.
+    /// \param color Single color channel value
+    /// \param intent Rendering intent
+    /// \param reporter Render error reporter (used, when color transform fails)
+    virtual QColor getColorFromDeviceGray(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const = 0;
+
+    /// Converts color in Device RGB color space to the target device
+    /// color space. If error occurs, then invalid color is returned.
+    /// Caller then should handle this - try to convert color as accurate
+    /// as possible.
+    /// \param color Three color channel value (R,G,B channel)
+    /// \param intent Rendering intent
+    /// \param reporter Render error reporter (used, when color transform fails)
+    virtual QColor getColorFromDeviceRGB(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const = 0;
+
+    /// Converts color in Device CMYK color space to the target device
+    /// color space. If error occurs, then invalid color is returned.
+    /// Caller then should handle this - try to convert color as accurate
+    /// as possible.
+    /// \param color Four color channel value (C,M,Y,K channel)
+    /// \param intent Rendering intent
+    /// \param reporter Render error reporter (used, when color transform fails)
+    virtual QColor getColorFromDeviceCMYK(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const = 0;
+
+    /// Converts color in XYZ color space to the target device
+    /// color space. If error occurs, then invalid color is returned.
+    /// Caller then should handle this - try to convert color as accurate
+    /// as possible.
+    /// \param whitePoint White point of source XYZ color space
+    /// \param Three color channel value (X,Y,Z channel)
+    /// \param intent Rendering intent
+    /// \param reporter Render error reporter (used, when color transform fails)
+    virtual QColor getColorFromXYZ(const PDFColor3& whitePoint, const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const = 0;
+};
+
+class PDFCMSGeneric : public PDFCMS
+{
+public:
+    explicit inline PDFCMSGeneric() = default;
+
+    virtual bool isCompatible(const PDFCMSSettings& settings) const override;
+    virtual QColor getColorFromDeviceGray(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const override;
+    virtual QColor getColorFromDeviceRGB(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const override;
+    virtual QColor getColorFromDeviceCMYK(const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const override;
+    virtual QColor getColorFromXYZ(const PDFColor3& whitePoint, const PDFColor& color, RenderingIntent intent, PDFRenderErrorReporter* reporter) const override;
+};
+
+struct PDFColorSpaceIdentifier
+{
+    enum class Type
+    {
+        Gray,
+        sRGB,
+        RGB,
+        CMYK
+    };
+
+    Type type = Type::sRGB;
+    QString name;
+    QString id;
+    PDFReal temperature = 6500.0;
+    QPointF primaryR;
+    QPointF primaryG;
+    QPointF primaryB;
+    PDFReal gamma = 1.0;
+
+    /// Creates gray color space identifier
+    /// \param name Name of color profile
+    /// \param id Identifier of color profile
+    /// \param temperature White point temperature
+    /// \param gamma Gamma correction
+    static PDFColorSpaceIdentifier createGray(QString name, QString id, PDFReal temperature, PDFReal gamma);
+
+    /// Creates sRGB color space identifier
+    static PDFColorSpaceIdentifier createSRGB();
+
+    /// Creates RGB color space identifier
+    /// \param name Name of color profile
+    /// \param id Identifier of color profile
+    /// \param temperature White point temperature
+    /// \param primaryR Primary red
+    /// \param primaryG Primary green
+    /// \param primaryB Primary blue
+    /// \param gamma Gamma correction
+    static PDFColorSpaceIdentifier createRGB(QString name, QString id, PDFReal temperature, QPointF primaryR, QPointF primaryG, QPointF primaryB, PDFReal gamma);
+};
+
+using PDFColorSpaceIdentifiers = std::vector<PDFColorSpaceIdentifier>;
+
+/// Manager, that manages current color management system and also list
+/// of usable input and output color profiles. It has color profiles
+/// for outout device, and color profiles for input (gray/RGB/CMYK).
+/// It also handles settings, and it's changes. Constant functions
+/// is save to call from multiple threads, this also holds for some
+/// non-constant functions - manager is protected by mutexes.
+class PDFFORQTLIBSHARED_EXPORT PDFCMSManager : public QObject
+{
+    Q_OBJECT
+
+private:
+    using BaseClass = QObject;
+
+public:
+    explicit PDFCMSManager(QObject* parent);
+
+    const PDFColorSpaceIdentifiers& getOutputProfiles() const;
+    const PDFColorSpaceIdentifiers& getGrayProfiles() const;
+    const PDFColorSpaceIdentifiers& getRGBProfiles() const;
+    const PDFColorSpaceIdentifiers& getCMYKProfiles() const;
+
+    /// Returns default color management settings
+    PDFCMSSettings getDefaultSettings() const;
+
+    /// Get translated name for color management system
+    /// \param system System
+    static QString getSystemName(PDFCMSSettings::System system);
+
+signals:
+    void colorManagementSystemChanged();
+
+private:
+    PDFColorSpaceIdentifiers getOutputProfilesImpl() const;
+    PDFColorSpaceIdentifiers getGrayProfilesImpl() const;
+    PDFColorSpaceIdentifiers getRGBProfilesImpl() const;
+    PDFColorSpaceIdentifiers getCMYKProfilesImpl() const;
+
+    PDFCMSSettings m_settings;
+
+    mutable QMutex m_mutex;
+    mutable PDFCachedItem<PDFColorSpaceIdentifiers> m_outputProfiles;
+    mutable PDFCachedItem<PDFColorSpaceIdentifiers> m_grayProfiles;
+    mutable PDFCachedItem<PDFColorSpaceIdentifiers> m_RGBProfiles;
+    mutable PDFCachedItem<PDFColorSpaceIdentifiers> m_CMYKProfiles;
+};
+
+}   // namespace pdf
+
+#endif // PDFCMS_H

PdfForQtLib/sources/pdfglobal.h

@@ -150,6 +150,7 @@ enum class RendererEngine
 
 enum class RenderingIntent
 {
+    Auto,                   ///< Rendering intent is automatically selected
     Perceptual,
     AbsoluteColorimetric,
     RelativeColorimetric,

PdfForQtViewer/pdfforqtviewer.qrc

@@ -26,5 +26,6 @@
         <file>resources/shortcuts.svg</file>
         <file>resources/info.svg</file>
         <file>resources/send-mail.svg</file>
+        <file>resources/cms.svg</file>
     </qresource>
 </RCC>

PdfForQtViewer/pdfviewermainwindow.cpp

@@ -59,9 +59,10 @@
 namespace pdfviewer
 {
 
-PDFViewerMainWindow::PDFViewerMainWindow(QWidget *parent) :
+PDFViewerMainWindow::PDFViewerMainWindow(QWidget* parent) :
     QMainWindow(parent),
     ui(new Ui::PDFViewerMainWindow),
+    m_CMSManager(new pdf::PDFCMSManager(this)),
     m_settings(new PDFViewerSettings(this)),
     m_pdfWidget(nullptr),
     m_sidebarDockWidget(nullptr),
@@ -544,8 +545,7 @@ void PDFViewerMainWindow::readSettings()
         restoreState(state);
     }
 
-    m_settings->readSettings(settings);
+    m_settings->readSettings(settings, m_CMSManager->getDefaultSettings());
-
 }
 
 void PDFViewerMainWindow::readActionSettings()
@@ -976,10 +976,11 @@ void PDFViewerMainWindow::on_actionRendering_Errors_triggered()
 
 void PDFViewerMainWindow::on_actionOptions_triggered()
 {
-    PDFViewerSettingsDialog dialog(m_settings->getSettings(), getActions(), this);
+    PDFViewerSettingsDialog dialog(m_settings->getSettings(), m_settings->getColorManagementSystemSettings(), getActions(), m_CMSManager, this);
     if (dialog.exec() == QDialog::Accepted)
     {
         m_settings->setSettings(dialog.getSettings());
+        m_settings->setColorManagementSystemSettings(dialog.getCMSSettings());
     }
 }
 

PdfForQtViewer/pdfviewermainwindow.h

@@ -139,6 +139,7 @@ private:
     };
 
     Ui::PDFViewerMainWindow* ui;
+    pdf::PDFCMSManager* m_CMSManager;
     PDFViewerSettings* m_settings;
     pdf::PDFWidget* m_pdfWidget;
     QSharedPointer<pdf::PDFDocument> m_pdfDocument;

PdfForQtViewer/pdfviewersettings.cpp

@@ -26,11 +26,14 @@ const int PIXMAP_CACHE_LIMIT = QPixmapCache::cacheLimit();
 
 void PDFViewerSettings::setSettings(const PDFViewerSettings::Settings& settings)
 {
+    if (m_settings != settings)
+    {
         m_settings = settings;
         emit settingsChanged();
+    }
 }
 
-void PDFViewerSettings::readSettings(QSettings& settings)
+void PDFViewerSettings::readSettings(QSettings& settings, const pdf::PDFCMSSettings& defaultCMSSettings)
 {
     Settings defaultSettings;
 
@@ -52,6 +55,18 @@ void PDFViewerSettings::readSettings(QSettings& settings)
     m_settings.m_allowLaunchURI = settings.value("allowLaunchURI", defaultSettings.m_allowLaunchURI).toBool();
     settings.endGroup();
 
+    settings.beginGroup("ColorManagementSystemSettings");
+    m_colorManagementSystemSettings.system = static_cast<pdf::PDFCMSSettings::System>(settings.value("system", int(defaultCMSSettings.system)).toInt());
+    m_colorManagementSystemSettings.accuracy = static_cast<pdf::PDFCMSSettings::Accuracy>(settings.value("accuracy", int(defaultCMSSettings.accuracy)).toInt());
+    m_colorManagementSystemSettings.intent = static_cast<pdf::RenderingIntent>(settings.value("intent", int(defaultCMSSettings.intent)).toInt());
+    m_colorManagementSystemSettings.isBlackPointCompensationActive = settings.value("isBlackPointCompensationActive", defaultCMSSettings.isBlackPointCompensationActive).toBool();
+    m_colorManagementSystemSettings.isWhitePaperColorTransformed = settings.value("isWhitePaperColorTransformed", defaultCMSSettings.isWhitePaperColorTransformed).toBool();
+    m_colorManagementSystemSettings.outputCS = settings.value("outputCS", defaultCMSSettings.outputCS).toString();
+    m_colorManagementSystemSettings.deviceGray = settings.value("deviceGray", defaultCMSSettings.deviceGray).toString();
+    m_colorManagementSystemSettings.deviceRGB = settings.value("deviceRGB", defaultCMSSettings.deviceRGB).toString();
+    m_colorManagementSystemSettings.deviceCMYK = settings.value("deviceCMYK", defaultCMSSettings.deviceCMYK).toString();
+    settings.endGroup();
+
     emit settingsChanged();
 }
 
@@ -74,6 +89,18 @@ void PDFViewerSettings::writeSettings(QSettings& settings)
     settings.setValue("allowLaunchApplications", m_settings.m_allowLaunchApplications);
     settings.setValue("allowLaunchURI", m_settings.m_allowLaunchURI);
     settings.endGroup();
+
+    settings.beginGroup("ColorManagementSystemSettings");
+    settings.setValue("system", int(m_colorManagementSystemSettings.system));
+    settings.setValue("accuracy", int(m_colorManagementSystemSettings.accuracy));
+    settings.setValue("intent", int(m_colorManagementSystemSettings.intent));
+    settings.setValue("isBlackPointCompensationActive", m_colorManagementSystemSettings.isBlackPointCompensationActive);
+    settings.setValue("isWhitePaperColorTransformed", m_colorManagementSystemSettings.isWhitePaperColorTransformed);
+    settings.setValue("outputCS", m_colorManagementSystemSettings.outputCS);
+    settings.setValue("deviceGray", m_colorManagementSystemSettings.deviceGray);
+    settings.setValue("deviceRGB", m_colorManagementSystemSettings.deviceRGB);
+    settings.setValue("deviceCMYK", m_colorManagementSystemSettings.deviceCMYK);
+    settings.endGroup();
 }
 
 QString PDFViewerSettings::getDirectory() const

PdfForQtViewer/pdfviewersettings.h

@@ -19,6 +19,7 @@
 #define PDFVIEWERSETTINGS_H
 
 #include "pdfrenderer.h"
+#include "pdfcms.h"
 
 #include <QObject>
 
@@ -40,6 +41,9 @@ public:
     {
         Settings();
 
+        bool operator==(const Settings&) const = default;
+        bool operator!=(const Settings&) const = default;
+
         pdf::PDFRenderer::Features m_features;
         QString m_directory;
         pdf::RendererEngine m_rendererEngine;
@@ -62,7 +66,7 @@ public:
     const Settings& getSettings() const { return m_settings; }
     void setSettings(const Settings& settings);
 
-    void readSettings(QSettings& settings);
+    void readSettings(QSettings& settings, const pdf::PDFCMSSettings& defaultCMSSettings);
     void writeSettings(QSettings& settings);
 
     QString getDirectory() const;
@@ -94,14 +98,17 @@ public:
     int getFontCacheLimit() const { return m_settings.m_fontCacheLimit; }
     int getInstancedFontCacheLimit() const { return m_settings.m_instancedFontCacheLimit; }
 
+    const pdf::PDFCMSSettings& getColorManagementSystemSettings() const { return m_colorManagementSystemSettings; }
+    void setColorManagementSystemSettings(const pdf::PDFCMSSettings& settings) { m_colorManagementSystemSettings = settings; }
+
 signals:
     void settingsChanged();
 
 private:
     Settings m_settings;
+    pdf::PDFCMSSettings m_colorManagementSystemSettings;
 };
 
-
 }   // namespace pdfviewer
 
 #endif // PDFVIEWERSETTINGS_H

PdfForQtViewer/pdfviewersettingsdialog.cpp

@@ -29,10 +29,14 @@
 namespace pdfviewer
 {
 
-PDFViewerSettingsDialog::PDFViewerSettingsDialog(const PDFViewerSettings::Settings& settings, QList<QAction*> actions, QWidget *parent) :
+PDFViewerSettingsDialog::PDFViewerSettingsDialog(const PDFViewerSettings::Settings& settings,
+                                                 const pdf::PDFCMSSettings& cmsSettings,
+                                                 QList<QAction*> actions,
+                                                 pdf::PDFCMSManager* cmsManager, QWidget *parent) :
     QDialog(parent),
     ui(new Ui::PDFViewerSettingsDialog),
     m_settings(settings),
+    m_cmsSettings(cmsSettings),
     m_actions(),
     m_isLoadingData(false)
 {
@@ -43,6 +47,7 @@ PDFViewerSettingsDialog::PDFViewerSettingsDialog(const PDFViewerSettings::Settin
     new QListWidgetItem(QIcon(":/resources/shading.svg"), tr("Shading"), ui->optionsPagesWidget, ShadingSettings);
     new QListWidgetItem(QIcon(":/resources/cache.svg"), tr("Cache"), ui->optionsPagesWidget, CacheSettings);
     new QListWidgetItem(QIcon(":/resources/shortcuts.svg"), tr("Shortcuts"), ui->optionsPagesWidget, ShortcutSettings);
+    new QListWidgetItem(QIcon(":/resources/cms.svg"), tr("Colors"), ui->optionsPagesWidget, ColorManagementSystemSettings);
     new QListWidgetItem(QIcon(":/resources/security.svg"), tr("Security"), ui->optionsPagesWidget, SecuritySettings);
 
     ui->renderingEngineComboBox->addItem(tr("Software"), static_cast<int>(pdf::RendererEngine::Software));
@@ -53,7 +58,33 @@ PDFViewerSettingsDialog::PDFViewerSettingsDialog(const PDFViewerSettings::Settin
         ui->multisampleAntialiasingSamplesCountComboBox->addItem(QString::number(i), i);
     }
 
-    for (QWidget* widget : { ui->engineInfoLabel, ui->renderingInfoLabel, ui->securityInfoLabel })
+    // Load CMS data
+    ui->cmsTypeComboBox->addItem(pdf::PDFCMSManager::getSystemName(pdf::PDFCMSSettings::System::Generic), int(pdf::PDFCMSSettings::System::Generic));
+    ui->cmsTypeComboBox->addItem(pdf::PDFCMSManager::getSystemName(pdf::PDFCMSSettings::System::LittleCMS2), int(pdf::PDFCMSSettings::System::LittleCMS2));
+
+    ui->cmsRenderingIntentComboBox->addItem(tr("Auto"), int(pdf::RenderingIntent::Auto));
+    ui->cmsRenderingIntentComboBox->addItem(tr("Perceptual"), int(pdf::RenderingIntent::Perceptual));
+    ui->cmsRenderingIntentComboBox->addItem(tr("Relative colorimetric"), int(pdf::RenderingIntent::RelativeColorimetric));
+    ui->cmsRenderingIntentComboBox->addItem(tr("Absolute colorimetric"), int(pdf::RenderingIntent::AbsoluteColorimetric));
+    ui->cmsRenderingIntentComboBox->addItem(tr("Saturation"), int(pdf::RenderingIntent::Saturation));
+
+    ui->cmsAccuracyComboBox->addItem(tr("Low"), int(pdf::PDFCMSSettings::Accuracy::Low));
+    ui->cmsAccuracyComboBox->addItem(tr("Medium"), int(pdf::PDFCMSSettings::Accuracy::Medium));
+    ui->cmsAccuracyComboBox->addItem(tr("High"), int(pdf::PDFCMSSettings::Accuracy::High));
+
+    auto fillColorProfileList = [](QComboBox* comboBox, const pdf::PDFColorSpaceIdentifiers& identifiers)
+    {
+        for (const pdf::PDFColorSpaceIdentifier& identifier : identifiers)
+        {
+            comboBox->addItem(identifier.name, identifier.id);
+        }
+    };
+    fillColorProfileList(ui->cmsOutputColorProfileComboBox, cmsManager->getOutputProfiles());
+    fillColorProfileList(ui->cmsDeviceGrayColorProfileComboBox, cmsManager->getGrayProfiles());
+    fillColorProfileList(ui->cmsDeviceRGBColorProfileComboBox, cmsManager->getRGBProfiles());
+    fillColorProfileList(ui->cmsDeviceCMYKColorProfileComboBox, cmsManager->getCMYKProfiles());
+
+    for (QWidget* widget : { ui->engineInfoLabel, ui->renderingInfoLabel, ui->securityInfoLabel, ui->cmsInfoLabel })
     {
         widget->setMinimumWidth(widget->sizeHint().width());
     }
@@ -120,6 +151,10 @@ void PDFViewerSettingsDialog::on_optionsPagesWidget_currentItemChanged(QListWidg
             ui->stackedWidget->setCurrentWidget(ui->shortcutsPage);
             break;
 
+        case ColorManagementSystemSettings:
+            ui->stackedWidget->setCurrentWidget(ui->cmsPage);
+            break;
+
         case SecuritySettings:
             ui->stackedWidget->setCurrentWidget(ui->securityPage);
             break;
@@ -183,6 +218,47 @@ void PDFViewerSettingsDialog::loadData()
     // Security
     ui->allowLaunchCheckBox->setChecked(m_settings.m_allowLaunchApplications);
     ui->allowRunURICheckBox->setChecked(m_settings.m_allowLaunchURI);
+
+    // CMS
+    ui->cmsTypeComboBox->setCurrentIndex(ui->cmsTypeComboBox->findData(int(m_cmsSettings.system)));
+    if (m_cmsSettings.system != pdf::PDFCMSSettings::System::Generic)
+    {
+        ui->cmsRenderingIntentComboBox->setEnabled(true);
+        ui->cmsRenderingIntentComboBox->setCurrentIndex(ui->cmsRenderingIntentComboBox->findData(int(m_cmsSettings.intent)));
+        ui->cmsAccuracyComboBox->setEnabled(true);
+        ui->cmsAccuracyComboBox->setCurrentIndex(ui->cmsAccuracyComboBox->findData(int(m_cmsSettings.accuracy)));
+        ui->cmsIsBlackPointCompensationCheckBox->setEnabled(true);
+        ui->cmsIsBlackPointCompensationCheckBox->setChecked(m_cmsSettings.isBlackPointCompensationActive);
+        ui->cmsWhitePaperColorTransformedCheckBox->setEnabled(true);
+        ui->cmsWhitePaperColorTransformedCheckBox->setChecked(m_cmsSettings.isWhitePaperColorTransformed);
+        ui->cmsOutputColorProfileComboBox->setEnabled(true);
+        ui->cmsOutputColorProfileComboBox->setCurrentIndex(ui->cmsOutputColorProfileComboBox->findData(m_cmsSettings.outputCS));
+        ui->cmsDeviceGrayColorProfileComboBox->setEnabled(true);
+        ui->cmsDeviceGrayColorProfileComboBox->setCurrentIndex(ui->cmsDeviceGrayColorProfileComboBox->findData(m_cmsSettings.deviceGray));
+        ui->cmsDeviceRGBColorProfileComboBox->setEnabled(true);
+        ui->cmsDeviceRGBColorProfileComboBox->setCurrentIndex(ui->cmsDeviceRGBColorProfileComboBox->findData(m_cmsSettings.deviceRGB));
+        ui->cmsDeviceCMYKColorProfileComboBox->setEnabled(true);
+        ui->cmsDeviceCMYKColorProfileComboBox->setCurrentIndex(ui->cmsDeviceCMYKColorProfileComboBox->findData(m_cmsSettings.deviceCMYK));
+    }
+    else
+    {
+        ui->cmsRenderingIntentComboBox->setEnabled(false);
+        ui->cmsRenderingIntentComboBox->setCurrentIndex(-1);
+        ui->cmsAccuracyComboBox->setEnabled(false);
+        ui->cmsAccuracyComboBox->setCurrentIndex(-1);
+        ui->cmsIsBlackPointCompensationCheckBox->setEnabled(false);
+        ui->cmsIsBlackPointCompensationCheckBox->setChecked(false);
+        ui->cmsWhitePaperColorTransformedCheckBox->setEnabled(false);
+        ui->cmsWhitePaperColorTransformedCheckBox->setChecked(false);
+        ui->cmsOutputColorProfileComboBox->setEnabled(false);
+        ui->cmsOutputColorProfileComboBox->setCurrentIndex(-1);
+        ui->cmsDeviceGrayColorProfileComboBox->setEnabled(false);
+        ui->cmsDeviceGrayColorProfileComboBox->setCurrentIndex(-1);
+        ui->cmsDeviceRGBColorProfileComboBox->setEnabled(false);
+        ui->cmsDeviceRGBColorProfileComboBox->setCurrentIndex(-1);
+        ui->cmsDeviceCMYKColorProfileComboBox->setEnabled(false);
+        ui->cmsDeviceCMYKColorProfileComboBox->setCurrentIndex(-1);
+    }
 }
 
 void PDFViewerSettingsDialog::saveData()
@@ -270,6 +346,42 @@ void PDFViewerSettingsDialog::saveData()
     {
         m_settings.m_instancedFontCacheLimit = ui->cachedInstancedFontLimitEdit->value();
     }
+    else if (sender == ui->cmsTypeComboBox)
+    {
+        m_cmsSettings.system = static_cast<pdf::PDFCMSSettings::System>(ui->cmsTypeComboBox->currentData().toInt());
+    }
+    else if (sender == ui->cmsRenderingIntentComboBox)
+    {
+        m_cmsSettings.intent = static_cast<pdf::RenderingIntent>(ui->cmsRenderingIntentComboBox->currentData().toInt());
+    }
+    else if (sender == ui->cmsAccuracyComboBox)
+    {
+        m_cmsSettings.accuracy = static_cast<pdf::PDFCMSSettings::Accuracy>(ui->cmsAccuracyComboBox->currentData().toInt());
+    }
+    else if (sender == ui->cmsIsBlackPointCompensationCheckBox)
+    {
+        m_cmsSettings.isBlackPointCompensationActive = ui->cmsIsBlackPointCompensationCheckBox->isChecked();
+    }
+    else if (sender == ui->cmsWhitePaperColorTransformedCheckBox)
+    {
+        m_cmsSettings.isWhitePaperColorTransformed = ui->cmsWhitePaperColorTransformedCheckBox->isChecked();
+    }
+    else if (sender == ui->cmsOutputColorProfileComboBox)
+    {
+        m_cmsSettings.outputCS = ui->cmsOutputColorProfileComboBox->currentData().toString();
+    }
+    else if (sender == ui->cmsDeviceGrayColorProfileComboBox)
+    {
+        m_cmsSettings.deviceGray = ui->cmsDeviceGrayColorProfileComboBox->currentData().toString();
+    }
+    else if (sender == ui->cmsDeviceRGBColorProfileComboBox)
+    {
+        m_cmsSettings.deviceRGB = ui->cmsDeviceRGBColorProfileComboBox->currentData().toString();
+    }
+    else if (sender == ui->cmsDeviceCMYKColorProfileComboBox)
+    {
+        m_cmsSettings.deviceCMYK = ui->cmsDeviceCMYKColorProfileComboBox->currentData().toString();
+    }
 
     loadData();
 }

PdfForQtViewer/pdfviewersettingsdialog.h

@@ -37,7 +37,17 @@ class PDFViewerSettingsDialog : public QDialog
     Q_OBJECT
 
 public:
-    explicit PDFViewerSettingsDialog(const PDFViewerSettings::Settings& settings, QList<QAction*> actions, QWidget* parent);
+    /// Constructor
+    /// \param settings Viewer settings
+    /// \param cmsSettings Color management system settings
+    /// \param actions Actions
+    /// \param cmsManager CMS manager
+    /// \param parent Parent widget
+    explicit PDFViewerSettingsDialog(const PDFViewerSettings::Settings& settings,
+                                     const pdf::PDFCMSSettings& cmsSettings,
+                                     QList<QAction*> actions,
+                                     pdf::PDFCMSManager* cmsManager,
+                                     QWidget* parent);
     virtual ~PDFViewerSettingsDialog() override;
 
     virtual void accept() override;
@@ -49,10 +59,12 @@ public:
         ShadingSettings,
         CacheSettings,
         ShortcutSettings,
+        ColorManagementSystemSettings,
         SecuritySettings
     };
 
     const PDFViewerSettings::Settings& getSettings() const { return m_settings; }
+    const pdf::PDFCMSSettings& getCMSSettings() const { return m_cmsSettings; }
 
 private slots:
     void on_optionsPagesWidget_currentItemChanged(QListWidgetItem* current, QListWidgetItem* previous);
@@ -66,6 +78,7 @@ private:
 
     Ui::PDFViewerSettingsDialog* ui;
     PDFViewerSettings::Settings m_settings;
+    pdf::PDFCMSSettings m_cmsSettings;
     QList<QAction*> m_actions;
     bool m_isLoadingData;
 };

PdfForQtViewer/pdfviewersettingsdialog.ui

@@ -6,8 +6,8 @@
    <rect>
     <x>0</x>
     <y>0</y>
-    <width>720</width>
+    <width>742</width>
-    <height>538</height>
+    <height>573</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -26,7 +26,7 @@
      <item>
       <widget class="QStackedWidget" name="stackedWidget">
        <property name="currentIndex">
-        <number>4</number>
+        <number>5</number>
        </property>
        <widget class="QWidget" name="enginePage">
         <layout class="QVBoxLayout" name="enginePageLayout">
@@ -564,6 +564,144 @@
          </item>
         </layout>
        </widget>
+       <widget class="QWidget" name="cmsPage">
+        <layout class="QVBoxLayout" name="verticalLayout_4">
+         <item>
+          <widget class="QGroupBox" name="cmsGroupBox">
+           <property name="title">
+            <string>Color management system settings</string>
+           </property>
+           <layout class="QVBoxLayout" name="verticalLayout_6">
+            <item>
+             <layout class="QGridLayout" name="cmsWidgetsLayout">
+              <item row="0" column="1">
+               <widget class="QComboBox" name="cmsTypeComboBox"/>
+              </item>
+              <item row="4" column="1">
+               <widget class="QCheckBox" name="cmsWhitePaperColorTransformedCheckBox">
+                <property name="text">
+                 <string>Enabled</string>
+                </property>
+               </widget>
+              </item>
+              <item row="4" column="0">
+               <widget class="QLabel" name="cmsWhitePaperColorTransformedLabel">
+                <property name="text">
+                 <string>White paper color transformed</string>
+                </property>
+               </widget>
+              </item>
+              <item row="7" column="0">
+               <widget class="QLabel" name="cmsDeviceRGBProfileLabel">
+                <property name="text">
+                 <string>Device RGB color profile</string>
+                </property>
+               </widget>
+              </item>
+              <item row="5" column="0">
+               <widget class="QLabel" name="cmsOutputProfileLabel">
+                <property name="text">
+                 <string>Output color profile</string>
+                </property>
+               </widget>
+              </item>
+              <item row="3" column="1">
+               <widget class="QCheckBox" name="cmsIsBlackPointCompensationCheckBox">
+                <property name="text">
+                 <string>Enabled</string>
+                </property>
+               </widget>
+              </item>
+              <item row="6" column="0">
+               <widget class="QLabel" name="cmsDeviceGrayColorProfileLabel">
+                <property name="text">
+                 <string>Device gray color profile</string>
+                </property>
+               </widget>
+              </item>
+              <item row="1" column="1">
+               <widget class="QComboBox" name="cmsRenderingIntentComboBox"/>
+              </item>
+              <item row="1" column="0">
+               <widget class="QLabel" name="cmsRenderingIntentLabel">
+                <property name="text">
+                 <string>Rendering intent</string>
+                </property>
+               </widget>
+              </item>
+              <item row="2" column="1">
+               <widget class="QComboBox" name="cmsAccuracyComboBox"/>
+              </item>
+              <item row="2" column="0">
+               <widget class="QLabel" name="cmsAccuracyLabel">
+                <property name="text">
+                 <string>Accuracy</string>
+                </property>
+               </widget>
+              </item>
+              <item row="0" column="0">
+               <widget class="QLabel" name="cmsLabel">
+                <property name="text">
+                 <string>Color management system</string>
+                </property>
+               </widget>
+              </item>
+              <item row="3" column="0">
+               <widget class="QLabel" name="cmsBlackPointCompensationLabel">
+                <property name="text">
+                 <string>Black point compensation</string>
+                </property>
+               </widget>
+              </item>
+              <item row="8" column="0">
+               <widget class="QLabel" name="cmsDeviceCMYKColorProfileLabel">
+                <property name="text">
+                 <string>Device CMYK color profile</string>
+                </property>
+               </widget>
+              </item>
+              <item row="5" column="1">
+               <widget class="QComboBox" name="cmsOutputColorProfileComboBox"/>
+              </item>
+              <item row="6" column="1">
+               <widget class="QComboBox" name="cmsDeviceGrayColorProfileComboBox"/>
+              </item>
+              <item row="7" column="1">
+               <widget class="QComboBox" name="cmsDeviceRGBColorProfileComboBox"/>
+              </item>
+              <item row="8" column="1">
+               <widget class="QComboBox" name="cmsDeviceCMYKColorProfileComboBox"/>
+              </item>
+             </layout>
+            </item>
+            <item>
+             <widget class="QLabel" name="cmsInfoLabel">
+              <property name="text">
+               <string>&lt;html&gt;&lt;head/&gt;&lt;body&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Color management system &lt;/span&gt;manages input and output color profiles and color transformations. It enables to perceive real colors defined in PDF document. Select 'Generic' to disable this functionality for fast color transform. &lt;span style=&quot; font-weight:600;&quot;&gt;Rendering intent&lt;/span&gt; affects how colors are transformed. Rendering intents are usually defined in content streams in PDF document, but you can override them, if you select other intent, than 'Auto'. &lt;span style=&quot; font-weight:600;&quot;&gt;Accuracy &lt;/span&gt;affects how precise the color transformation would be, at the cost of more memory consumption. &lt;span style=&quot; font-weight:600;&quot;&gt;Black point compensation&lt;/span&gt; compensates black colors out of gamut. &lt;span style=&quot; font-weight:600;&quot;&gt;White paper color transformed &lt;/span&gt;affects color of the underlying white paper - it transforms pure white from device RGB profile to output profile, if enabled.&lt;/p&gt;&lt;p&gt;&lt;span style=&quot; font-weight:600;&quot;&gt;Output color profile&lt;/span&gt; defines output (target) rendering profile. This profile should be color space, in which your screen is displaying  colors. You can also define color spaces for &lt;span style=&quot; font-weight:600;&quot;&gt;gray/RGB/CMYK&lt;/span&gt; device color spaces, which are used to transform gray/RGB/CMYK colors to the output color profile.&lt;/p&gt;&lt;/body&gt;&lt;/html&gt;</string>
+              </property>
+              <property name="wordWrap">
+               <bool>true</bool>
+              </property>
+             </widget>
+            </item>
+            <item>
+             <spacer name="cmsVerticalSpacer">
+              <property name="orientation">
+               <enum>Qt::Vertical</enum>
+              </property>
+              <property name="sizeHint" stdset="0">
+               <size>
+                <width>20</width>
+                <height>41</height>
+               </size>
+              </property>
+             </spacer>
+            </item>
+           </layout>
+          </widget>
+         </item>
+        </layout>
+       </widget>
        <widget class="QWidget" name="securityPage">
         <layout class="QVBoxLayout" name="securityPageLayout">
          <property name="leftMargin">

PdfForQtViewer/resources/cms.svg

@@ -0,0 +1,110 @@
+<?xml version="1.0" encoding="UTF-8" standalone="no"?>
+<!-- Created with Inkscape (http://www.inkscape.org/) -->
+
+<svg
+   xmlns:dc="http://purl.org/dc/elements/1.1/"
+   xmlns:cc="http://creativecommons.org/ns#"
+   xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#"
+   xmlns:svg="http://www.w3.org/2000/svg"
+   xmlns="http://www.w3.org/2000/svg"
+   xmlns:sodipodi="http://sodipodi.sourceforge.net/DTD/sodipodi-0.dtd"
+   xmlns:inkscape="http://www.inkscape.org/namespaces/inkscape"
+   width="30mm"
+   height="30mm"
+   viewBox="0 0 30 30"
+   version="1.1"
+   id="svg8"
+   inkscape:version="0.92.4 (5da689c313, 2019-01-14)"
+   sodipodi:docname="cms.svg">
+  <defs
+     id="defs2">
+    <inkscape:path-effect
+       effect="spiro"
+       id="path-effect831"
+       is_visible="true" />
+  </defs>
+  <sodipodi:namedview
+     id="base"
+     pagecolor="#ffffff"
+     bordercolor="#666666"
+     borderopacity="1.0"
+     inkscape:pageopacity="0.0"
+     inkscape:pageshadow="2"
+     inkscape:zoom="5.6"
+     inkscape:cx="164.25422"
+     inkscape:cy="113.44001"
+     inkscape:document-units="mm"
+     inkscape:current-layer="layer1"
+     showgrid="false"
+     inkscape:window-width="3840"
+     inkscape:window-height="2035"
+     inkscape:window-x="-13"
+     inkscape:window-y="-13"
+     inkscape:window-maximized="1" />
+  <metadata
+     id="metadata5">
+    <rdf:RDF>
+      <cc:Work
+         rdf:about="">
+        <dc:format>image/svg+xml</dc:format>
+        <dc:type
+           rdf:resource="http://purl.org/dc/dcmitype/StillImage" />
+        <dc:title></dc:title>
+        <cc:license
+           rdf:resource="http://creativecommons.org/licenses/by-sa/4.0/" />
+        <dc:creator>
+          <cc:Agent>
+            <dc:title>Jakub Melka</dc:title>
+          </cc:Agent>
+        </dc:creator>
+      </cc:Work>
+      <cc:License
+         rdf:about="http://creativecommons.org/licenses/by-sa/4.0/">
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Reproduction" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#Distribution" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Notice" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#Attribution" />
+        <cc:permits
+           rdf:resource="http://creativecommons.org/ns#DerivativeWorks" />
+        <cc:requires
+           rdf:resource="http://creativecommons.org/ns#ShareAlike" />
+      </cc:License>
+    </rdf:RDF>
+  </metadata>
+  <g
+     inkscape:label="Vrstva 1"
+     inkscape:groupmode="layer"
+     id="layer1"
+     transform="translate(0,-267)">
+    <path
+       style="fill:none;stroke:#000000;stroke-width:0.26458332px;stroke-linecap:butt;stroke-linejoin:miter;stroke-opacity:1"
+       d="m 11.646391,283.58184 v 0 0"
+       id="path837"
+       inkscape:connector-curvature="0" />
+    <ellipse
+       style="fill:#969696;fill-opacity:0.75294119;stroke:none;stroke-width:1.3012532;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:stroke fill markers"
+       id="path876"
+       cx="9.6383934"
+       cy="277.41611"
+       rx="7.7485123"
+       ry="7.9611235" />
+    <ellipse
+       style="fill:#000000;fill-opacity:0.75294119;stroke:none;stroke-width:1.3012532;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:stroke fill markers"
+       id="path876-0"
+       cx="19.607515"
+       cy="278.33743"
+       rx="7.7485123"
+       ry="7.9611239" />
+    <ellipse
+       style="fill:#e6e6e6;fill-opacity:0.75294119;stroke:none;stroke-width:1.3012532;stroke-linejoin:miter;stroke-miterlimit:4;stroke-dasharray:none;stroke-opacity:1;paint-order:stroke fill markers"
+       id="path876-06"
+       cx="13.512649"
+       cy="286.41666"
+       rx="7.7485123"
+       ry="7.9611239" />
+  </g>
+</svg>