From cdb301b357a8daab9a4696604658597dd976bfb5 Mon Sep 17 00:00:00 2001
From: Artem Pavlenko <artem@mapnik.org>
Date: Tue, 20 Feb 2018 11:43:55 +0100
Subject: [PATCH] enable high dpi scaling

---
 demo/viewer/main.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/demo/viewer/main.cpp b/demo/viewer/main.cpp
index 93ef024c9..ad717ebbf 100644
--- a/demo/viewer/main.cpp
+++ b/demo/viewer/main.cpp
@@ -30,9 +30,9 @@ int main( int argc, char **argv )
 {
     using mapnik::datasource_cache;
     using mapnik::freetype_engine;
-
     try
     {
+        QApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
         QCoreApplication::setOrganizationName("Mapnik");
         QCoreApplication::setOrganizationDomain("mapnik.org");
         QCoreApplication::setApplicationName("Viewer");