diff --git a/src/laybasic/laybasic/layDitherPattern.cc b/src/laybasic/laybasic/layDitherPattern.cc
index b4faa1e93..efe54d0ff 100644
--- a/src/laybasic/laybasic/layDitherPattern.cc
+++ b/src/laybasic/laybasic/layDitherPattern.cc
@@ -555,6 +555,7 @@ DitherPatternInfo::operator< (const DitherPatternInfo &d) const
   return m_order_index < d.m_order_index;
 }
 
+// TODO including a scaling algorithm in this formula, or give more resolution to the dither
 QBitmap
 DitherPatternInfo::get_bitmap (int width, int height) const
 {
diff --git a/src/laybasic/laybasic/layLayerToolbox.cc b/src/laybasic/laybasic/layLayerToolbox.cc
index 583478775..b7bf84788 100644
--- a/src/laybasic/laybasic/layLayerToolbox.cc
+++ b/src/laybasic/laybasic/layLayerToolbox.cc
@@ -200,16 +200,25 @@ LCPDitherPalette::create_pixmap_for (LCPActiveLabel *b, int n)
   const unsigned int h = 24;
   const unsigned int w = 24;
 
-  QImage image (w, h, QImage::Format_RGB32);
-  image.fill (color0.rgb ());
+#if QT_VERSION > 0x050000
+  unsigned int dpr = devicePixelRatio ();
+#else
+  unsigned int dpr = 1;
+#endif
 
-  QBitmap bitmap = pattern.pattern (n).get_bitmap (w, h);
+  QImage image (w * dpr, h * dpr, QImage::Format_RGB32);
+  image.fill (color0.rgb ());
+  image.setDevicePixelRatio(dpr);
+
+  // TODO include a scaling algorithm in get_bitmap, because it looks small in highDPI screens
+  QBitmap bitmap = pattern.pattern (n).get_bitmap (w * dpr, h * dpr);
   QPainter painter (&image);
   painter.setPen (QPen (color1));
   painter.setBackgroundMode (Qt::TransparentMode);
-  painter.drawPixmap (0, 0, bitmap);
+  painter.drawPixmap (0, 0, w, h, bitmap);
 
   QPixmap pixmap = QPixmap::fromImage (image); // Qt 4.6.0 workaround
+  pixmap.setDevicePixelRatio(dpr);
   b->setPixmap (pixmap);
 }
 
@@ -629,16 +638,24 @@ LCPStylePalette::create_pixmap_for_line_style (LCPActiveLabel *b, int n)
   const unsigned int h = 14;
   const unsigned int w = 24;
 
-  QImage image (w, h, QImage::Format_RGB32);
-  image.fill (color0.rgb ());
+#if QT_VERSION > 0x050000
+  unsigned int dpr = devicePixelRatio ();
+#else
+  unsigned int dpr = 1;
+#endif
 
-  QBitmap bitmap = styles.style (n).get_bitmap (w, h);
+  QImage image (dpr * w, dpr * h, QImage::Format_RGB32);
+  image.fill (color0.rgb ());
+  image.setDevicePixelRatio(dpr);
+
+  QBitmap bitmap = styles.style (n).get_bitmap (dpr * w, dpr * h);
   QPainter painter (&image);
   painter.setPen (QPen (color1));
   painter.setBackgroundMode (Qt::TransparentMode);
-  painter.drawPixmap (0, 0, bitmap);
+  painter.drawPixmap (0, 0, w, h, bitmap);
 
   QPixmap pixmap = QPixmap::fromImage (image); // Qt 4.6.0 workaround
+  pixmap.setDevicePixelRatio(dpr);
   b->setPixmap (pixmap);
 }
 
diff --git a/src/laybasic/laybasic/layLayoutCanvas.cc b/src/laybasic/laybasic/layLayoutCanvas.cc
index ce8293b35..ae6fa4379 100644
--- a/src/laybasic/laybasic/layLayoutCanvas.cc
+++ b/src/laybasic/laybasic/layLayoutCanvas.cc
@@ -291,8 +291,6 @@ LayoutCanvas::LayoutCanvas (QWidget *parent, lay::LayoutView *view, const char *
 {
 #if QT_VERSION > 0x050000
   m_dpr = devicePixelRatio ();
-#else
-  m_dpr = 1;
 #endif
 
   //  The gamma value used for subsampling: something between 1.8 and 2.2.
diff --git a/src/laybasic/laybasic/layLayoutViewConfigPages.cc b/src/laybasic/laybasic/layLayoutViewConfigPages.cc
index fb4436e1a..6e8f00532 100644
--- a/src/laybasic/laybasic/layLayoutViewConfigPages.cc
+++ b/src/laybasic/laybasic/layLayoutViewConfigPages.cc
@@ -1366,16 +1366,24 @@ LayoutViewConfigPage6a::update ()
     const unsigned int h = 26;
     const unsigned int w = 26;
 
-    QImage image (w, h, QImage::Format_RGB32);
-    image.fill (color0.rgb ());
+#if QT_VERSION > 0x050000
+    unsigned int dpr = devicePixelRatio ();
+#else
+    unsigned int dpr = 1;
+#endif
 
-    QBitmap bitmap = m_style.style (s).get_bitmap (w, h);
+    QImage image (w * dpr, h * dpr, QImage::Format_RGB32);
+    image.fill (color0.rgb ());
+    image.setDevicePixelRatio(dpr);
+
+    QBitmap bitmap = m_style.style (s).get_bitmap (w * dpr, h * dpr);
     QPainter painter (&image);
     painter.setPen (QPen (color1));
     painter.setBackgroundMode (Qt::TransparentMode);
-    painter.drawPixmap (0, 0, bitmap);
+    painter.drawPixmap (0, 0, w, h, bitmap);
 
     QPixmap pixmap = QPixmap::fromImage (image); // Qt 4.6.0 workaround
+    pixmap.setDevicePixelRatio(dpr);
     b->setIconSize (pixmap.size ());
     b->setIcon (QIcon (pixmap));