From 81c67c368647f6efbcd55d2d77c095d738cc7c1c Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Thu, 1 Nov 2018 00:07:24 +0100
Subject: [PATCH] Make wxDC::GetPPI() monitor-dependent in wxGTK3

Return the PPI for the display on which the associated window is shown
and not the main display PPI.
---
 src/gtk/dc.cpp | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/gtk/dc.cpp b/src/gtk/dc.cpp
index 3e7868173c..a41910ac32 100644
--- a/src/gtk/dc.cpp
+++ b/src/gtk/dc.cpp
@@ -15,6 +15,7 @@
 #include "wx/dcclient.h"
 #include "wx/dcmemory.h"
 #include "wx/dcscreen.h"
+#include "wx/display.h"
 #include "wx/gdicmn.h"
 #include "wx/icon.h"
 #include "wx/gtk/dc.h"
@@ -238,7 +239,7 @@ wxSize wxGTKCairoDCImpl::GetPPI() const
 {
     if ( m_window )
     {
-        return wxGetDisplayPPI();
+        return wxDisplay(m_window).GetPPI();
     }
 
     // For a non-window-based DC the concept of PPI doesn't make much sense