diff --git a/NEWS.md b/NEWS.md
index 3b7c5a32..0da4ce31 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -3,6 +3,8 @@ Red Panda C++ Version 1.0.3
     the app is restored to normal state, no matter it's current state.
   - enhancement: input shortcut in the option dialog's general -> shortcut page by pressing keys.
   - enhancement: shift+ctrl+down/up to move currenlt selection lines up / down
+  - fix: can't compile under linux
+  - enhancement: support Devcie Pixel Ratio ( for linux )
 
 Red Panda C++ Version 1.0.2
   - enhancement: press tab in column mode won't exit column mode
diff --git a/RedPandaIDE/mainwindow.cpp b/RedPandaIDE/mainwindow.cpp
index a0134e06..a00415ff 100644
--- a/RedPandaIDE/mainwindow.cpp
+++ b/RedPandaIDE/mainwindow.cpp
@@ -67,7 +67,7 @@
 #include <QTextBlock>
 #include <QTranslator>
 #include <QFileIconProvider>
-#include "MainWindow.h"
+#include "mainwindow.h"
 #include <QScrollBar>
 #include <QTextDocumentFragment>
 
diff --git a/RedPandaIDE/qsynedit/SynEdit.cpp b/RedPandaIDE/qsynedit/SynEdit.cpp
index 6bf86100..d357afdd 100644
--- a/RedPandaIDE/qsynedit/SynEdit.cpp
+++ b/RedPandaIDE/qsynedit/SynEdit.cpp
@@ -146,7 +146,9 @@ SynEdit::SynEdit(QWidget *parent) : QAbstractScrollArea(parent),
     mScrollHintColor = Qt::yellow;
     mScrollHintFormat = SynScrollHintFormat::shfTopLineOnly;
 
-    mContentImage = std::make_shared<QImage>(clientWidth(),clientHeight(),QImage::Format_ARGB32);
+    qreal dpr=devicePixelRatioF();
+    mContentImage = std::make_shared<QImage>(clientWidth()*dpr,clientHeight()*dpr,QImage::Format_ARGB32);
+    mContentImage->setDevicePixelRatio(dpr);
 
     mUseCodeFolding = true;
     m_blinkTimerId = 0;
@@ -5970,7 +5972,14 @@ void SynEdit::paintEvent(QPaintEvent *event)
         // only update caret
         // calculate the needed invalid area for caret
         //qDebug()<<"update caret"<<rcCaret;
-        painter.drawImage(rcCaret,*mContentImage,rcCaret);
+        QRectF cacheRC;
+        qreal dpr = mContentImage->devicePixelRatioF();
+        cacheRC.setLeft(rcClip.left()*dpr);
+        cacheRC.setTop(rcClip.top()*dpr);
+        cacheRC.setWidth(rcClip.width()*dpr);
+        cacheRC.setHeight(rcClip.height()*dpr);
+        qDebug()<<rcClip<<rcCaret<<cacheRC;
+        painter.drawImage(rcCaret,*mContentImage,cacheRC);
     } else {
         QRect rcDraw;
         int nL1, nL2, nC1, nC2;
@@ -6009,7 +6018,13 @@ void SynEdit::paintEvent(QPaintEvent *event)
         // If there is a custom paint handler call it.
         onPaint(painter);
         doOnPaintTransient(SynTransientType::ttAfter);
-        painter.drawImage(rcClip,*mContentImage,rcClip);
+        QRectF cacheRC;
+        qreal dpr = mContentImage->devicePixelRatioF();
+        cacheRC.setLeft(rcClip.left()*dpr);
+        cacheRC.setTop(rcClip.top()*dpr);
+        cacheRC.setWidth(rcClip.width()*dpr);
+        cacheRC.setHeight(rcClip.height()*dpr);
+        painter.drawImage(rcClip,*mContentImage,cacheRC);
     }
     paintCaret(painter, rcCaret);
 }
@@ -6017,8 +6032,10 @@ void SynEdit::paintEvent(QPaintEvent *event)
 void SynEdit::resizeEvent(QResizeEvent *)
 {
     //resize the cache image
-    std::shared_ptr<QImage> image = std::make_shared<QImage>(clientWidth(),clientHeight(),
+    qreal dpr = devicePixelRatioF();
+    std::shared_ptr<QImage> image = std::make_shared<QImage>(clientWidth()*dpr,clientHeight()*dpr,
                                                             QImage::Format_ARGB32);
+    image->setDevicePixelRatio(dpr);
     QRect newRect = image->rect().intersected(mContentImage->rect());
 
     QPainter painter(image.get());