Decoration: Support HiDPI

plugins/decoration/button.cpp

@@ -69,11 +69,12 @@ void Button::paint(QPainter *painter, const QRect &repaintRegion)
     auto c = decoration->client().toStrongRef().data();
     const bool isDarkMode = decoration->darkMode();
     const QRect &rect = geometry().toRect();
-    painter->save();
 
+    painter->save();
     painter->setRenderHints(QPainter::Antialiasing);
 
-    QRect btnRect(0, 0, 30, 30);
+    QRect btnRect(0, 0, 30 * decoration->devicePixelRatio(),
+                        30 * decoration->devicePixelRatio());
     btnRect.moveCenter(rect.center());
 
     if (isHovered() || isPressed()) {

plugins/decoration/decoration.cpp

@@ -31,6 +31,7 @@
 #include <QPainter>
 #include <QSettings>
 #include <QSharedPointer>
+#include <QImageReader>
 #include <QTimer>
 
 #include <KPluginFactory>
@@ -112,6 +113,8 @@ void Decoration::init()
     auto c = client().toStrongRef().data();
     auto s = settings();
 
+    m_devicePixelRatio = m_settings->value("PixelRatio", 1.0).toReal();
+
     reconfigure();
     updateTitleBar();
 
@@ -150,8 +153,10 @@ void Decoration::init()
     // cutefishos settings
     m_fileWatcher->addPath(m_settingsFile);
     connect(m_fileWatcher, &QFileSystemWatcher::fileChanged, this, [=] {
-        updateBtnPixmap();
+        m_settings->sync();
+        m_devicePixelRatio = m_settings->value("PixelRatio", 1.0).toReal();
 
+        updateBtnPixmap();
         update(titleBar());
         updateTitleBar();
         updateButtonsGeometry();
@@ -188,11 +193,11 @@ void Decoration::recalculateBorders()
 {
     QMargins borders;
 
-    if (!isMaximized()) {
-        borders.setLeft(m_frameRadius / 2);
-        borders.setRight(m_frameRadius / 2);
-        borders.setBottom(m_frameRadius / 2);
-    }
+//    if (!isMaximized()) {
+//        borders.setLeft(m_frameRadius / 2);
+//        borders.setRight(m_frameRadius / 2);
+//        borders.setBottom(m_frameRadius / 2);
+//    }
 
     borders.setTop(titleBarHeight());
 
@@ -343,17 +348,19 @@ void Decoration::updateBtnPixmap()
 
 QPixmap Decoration::fromSvgToPixmap(const QString &file, const QSize &size)
 {
-    const qreal ratio = qApp->devicePixelRatio();
-    QPixmap pixmap(size * ratio);
-    pixmap.load(file);
-    pixmap.setDevicePixelRatio(ratio);
-    return pixmap;
+    QImageReader reader(file);
+
+    if (reader.canRead()) {
+        reader.setScaledSize(size * m_devicePixelRatio);
+        return QPixmap::fromImage(reader.read());
+    }
+
+    return QPixmap();
 }
 
 int Decoration::titleBarHeight() const
 {
-    qreal ratio = qApp->devicePixelRatio();
-    return m_titleBarHeight * ratio;
+    return m_titleBarHeight * m_devicePixelRatio;
 
     // const QFontMetrics fontMetrics(settings()->font());
     // const int baseUnit = settings()->gridUnit();

plugins/decoration/decoration.h

@@ -51,6 +51,7 @@ public:
     QPixmap restoreBtnPixmap() { return m_restoreBtnPixmap; }
 
     bool darkMode() const;
+    qreal devicePixelRatio() const { return m_devicePixelRatio; }
 
 public slots:
     void init() override;
@@ -90,7 +91,8 @@ private:
 
 private:
     int m_titleBarHeight = 38;
-    int m_frameRadius = 0;
+    int m_frameRadius = 12;
+    qreal m_devicePixelRatio = 1.0;
     QColor m_titleBarBgColor = QColor(255, 255, 255, 255);
     QColor m_titleBarFgColor = QColor(56, 56, 56, 255);
     QColor m_unfocusedFgColor = QColor(127, 127, 127, 255);

plugins/roundedwindow/roundedwindow.cpp

@@ -111,8 +111,8 @@ void RoundedWindow::paintWindow(KWin::EffectWindow *w, int mask, QRegion region,
             || w->isDock()
             || w->isPopupWindow()
             || w->isPopupMenu()
-            // || data.quads.isTransformed()
-            // || (mask & (PAINT_WINDOW_TRANSFORMED|PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS))
+            || data.quads.isTransformed()
+            || (mask & (PAINT_WINDOW_TRANSFORMED | PAINT_SCREEN_WITH_TRANSFORMED_WINDOWS))
             || !hasShadow(data.quads)) {
         KWin::effects->paintWindow(w, mask, region, data);
         return;