From bfe11f233f7990ce8447b071a3067638100196ea Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Tue, 6 Nov 2018 03:20:24 +0100
Subject: [PATCH] Really implement wxGCDC::GetPPI()

Return the DPI of the associated window, if any, instead of the
hard-coded 72*72.
---
 src/common/dcgraph.cpp | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/common/dcgraph.cpp b/src/common/dcgraph.cpp
index d70113dfcc..292d058220 100644
--- a/src/common/dcgraph.cpp
+++ b/src/common/dcgraph.cpp
@@ -418,6 +418,15 @@ void wxGCDCImpl::SetTextBackground( const wxColour &col )
 
 wxSize wxGCDCImpl::GetPPI() const
 {
+    if ( m_graphicContext )
+    {
+        wxDouble x, y;
+        m_graphicContext->GetDPI(&x, &y);
+        return wxSize(wxRound(x), wxRound(y));
+    }
+
+    // This is the same value that wxGraphicsContext::GetDPI() returns by
+    // default.
     return wxSize(72, 72);
 }