From bf9eacad162fd0380e4dca4fcf3028eba03e0bb1 Mon Sep 17 00:00:00 2001
From: Sean D'Epagnier <seandepagnier@gmail.com>
Date: Mon, 12 Sep 2016 11:58:47 -0400
Subject: [PATCH] correct ppi implementation in wxqtdc

---
 src/qt/dc.cpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/src/qt/dc.cpp b/src/qt/dc.cpp
index e84e1c6abd..977142be7c 100644
--- a/src/qt/dc.cpp
+++ b/src/qt/dc.cpp
@@ -133,9 +133,10 @@ int wxQtDCImpl::GetDepth() const
 wxSize wxQtDCImpl::GetPPI() const
 {
     QScreen *srn = QApplication::screens().at(0);
-    qreal dotsPerInch = (qreal)srn->logicalDotsPerInch();
+    if (!srn)
+        return wxSize(m_qtPainter->device()->logicalDpiX(), m_qtPainter->device()->logicalDpiY());
+    qreal dotsPerInch = srn->logicalDotsPerInch();
     return wxSize(round(dotsPerInch), round(dotsPerInch));
-//    return wxSize(m_qtPainter->device()->logicalDpiX(), m_qtPainter->device()->logicalDpiY());
 }
 
 void wxQtDCImpl::SetFont(const wxFont& font)