Add thumbnail quality to settings

loadrunable.cpp

@@ -489,7 +489,9 @@ void LoadRunable::run()
         {
             if(rawImage && rawImage->valid())
             {
-                rawImage->resize(THUMB_SIZE, THUMB_SIZE);
+                if(QUALITY_RESIZE)
+                    rawImage->resize(THUMB_SIZE, THUMB_SIZE);
+
                 rawImage->convertToThumbnail();
             }
             QMetaObject::invokeMethod(m_receiver, "thumbnailLoadFinish", Qt::QueuedConnection, Q_ARG(std::shared_ptr<RawImage>, rawImage));

rawimage.cpp

@@ -7,6 +7,7 @@ int THUMB_SIZE = 128;
 int THUMB_SIZE_BORDER = 138;
 int THUMB_SIZE_BORDER_Y = 158;
 double SATURATION = 0.95;
+bool QUALITY_RESIZE = true;
 
 #ifdef __SSE2__
 template<typename T, int ch>

rawimage.h

@@ -12,6 +12,7 @@
 extern int THUMB_SIZE;
 extern int THUMB_SIZE_BORDER;
 extern int THUMB_SIZE_BORDER_Y;
+extern bool QUALITY_RESIZE;
 
 class Peak
 {

settingsdialog.cpp

@@ -71,11 +71,16 @@ SettingsDialog::SettingsDialog(QWidget *parent) : QDialog(parent)
     m_filtering->addItems({tr("Nearest"), tr("Linear"), tr("Cubic")});
     m_filtering->setCurrentIndex(FILTERING);
 
+    m_qualityThumbnail = new QCheckBox(tr("Smooth thumbnails"), this);
+    m_qualityThumbnail->setChecked(QUALITY_RESIZE);
+    m_qualityThumbnail->setToolTip(tr("Use box filter when downsampling thumbnails instead of nearest. Slightly slower."));
+
     layout->addRow(tr("Image preload count"), m_preloadImages);
     layout->addRow(tr("Thumbnails size"), m_thumSize);
     layout->addRow(tr("Saturation"), m_saturation);
     layout->addRow(tr("Slideshow interval"), m_slideShowTime);
     layout->addRow(tr("Image filtering"), m_filtering);
+    layout->addRow(m_qualityThumbnail);
     layout->addRow(m_useNativeDialog);
     //layout->addRow(new QLabel(tr("Changes in settings will take effect after program restart.")));
 
@@ -97,6 +102,7 @@ void SettingsDialog::loadSettings()
     DEFAULT_WIDTH = settings.value("settings/preloadimagecount", DEFAULT_WIDTH).toInt();
     SATURATION = settings.value("settings/saturation", 95.0).toDouble() / 100.0;
     FILTERING = settings.value("settings/filtering", FILTERING).toInt();
+    QUALITY_RESIZE = settings.value("settings/qualitythumbnail").toBool();
     QApplication::setAttribute(Qt::AA_DontUseNativeDialogs, settings.value("settings/dontusenativedialogs", false).toBool());
 }
 
@@ -118,6 +124,8 @@ void SettingsDialog::saveSettings()
     settings.setValue("settings/dontusenativedialogs", m_useNativeDialog->isChecked());
     settings.setValue("settings/saturation", m_saturation->value());
     settings.setValue("settings/slideshowtime", m_slideShowTime->value());
+    settings.setValue("settings/qualitythumbnail", m_qualityThumbnail->isChecked());
+    QUALITY_RESIZE = m_qualityThumbnail->isChecked();
     FILTERING = m_filtering->currentIndex();
     settings.setValue("settings/filtering", FILTERING);
     SATURATION = m_saturation->value() / 100.0;

settingsdialog.h

@@ -23,6 +23,7 @@ private:
     QDoubleSpinBox *m_slideShowTime;
     QDoubleSpinBox *m_saturation;
     QCheckBox *m_useNativeDialog;
+    QCheckBox *m_qualityThumbnail;
     QComboBox *m_filtering;
 };