2 files changed, 10 insertions, 1 deletions
diff --git a/subsurface-core/metrics.cpp b/subsurface-core/metrics.cpp
index db636794d..3c66528b8 100644
--- a/subsurface-core/metrics.cpp
+++ b/subsurface-core/metrics.cpp
@@ -15,7 +15,8 @@ IconMetrics::IconMetrics() :
 	sz_med(-1),
 	sz_big(-1),
 	sz_pic(-1),
-	spacing(-1)
+	spacing(-1),
+	dpr(1.0)
 {
 }
 
@@ -57,3 +58,8 @@ const IconMetrics & defaultIconMetrics()
 
 	return dfltIconMetrics;
 }
+
+void updateDevicePixelRatio(double dpr)
+{
+	dfltIconMetrics.dpr = dpr;
+}
diff --git a/subsurface-core/metrics.h b/subsurface-core/metrics.h
index 03d6b22e2..ca281b3b1 100644
--- a/subsurface-core/metrics.h
+++ b/subsurface-core/metrics.h
@@ -25,9 +25,12 @@ struct IconMetrics {
 	int sz_pic; // ex 128px
 	// icon spacing
 	int spacing; // ex 2px
+	// devicePixelRatio
+	double dpr; // 1.0 for traditional screens, HiDPI screens up to 3.0
 	IconMetrics();
 };
 
 const IconMetrics & defaultIconMetrics();
+void updateDevicePixelRatio(double dpr);
 
 #endif // METRICS_H