From 22288e02a280d6747b5652bc51707076a73efe53 Mon Sep 17 00:00:00 2001
From: Mark Roszko <mark.roszko@gmail.com>
Date: Mon, 8 Sep 2025 12:31:21 -0400
Subject: [PATCH] Fix cairo rendering on windows under wx 3.3

---
 common/draw_panel_gal.cpp      | 4 ++++
 common/gal/cairo/cairo_gal.cpp | 5 +++++
 2 files changed, 9 insertions(+)

diff --git a/common/draw_panel_gal.cpp b/common/draw_panel_gal.cpp
index 924fd81f60..db2757c11d 100644
--- a/common/draw_panel_gal.cpp
+++ b/common/draw_panel_gal.cpp
@@ -87,6 +87,10 @@ EDA_DRAW_PANEL_GAL::EDA_DRAW_PANEL_GAL( wxWindow* aParentWindow, wxWindowID aWin
         m_stealsFocus( true ),
         m_statusPopup( nullptr )
 {
+#ifdef _WIN32
+    // need to fix broken cairo rendering on Windows with wx 3.3
+    SetDoubleBuffered( false );
+#endif
     m_PaintEventCounter = std::make_unique<PROF_COUNTER>( "Draw panel paint events" );
 
     if( Pgm().GetCommonSettings()->m_Appearance.show_scrollbars )
diff --git a/common/gal/cairo/cairo_gal.cpp b/common/gal/cairo/cairo_gal.cpp
index bb14fd79f6..ed92e08bd4 100644
--- a/common/gal/cairo/cairo_gal.cpp
+++ b/common/gal/cairo/cairo_gal.cpp
@@ -1364,6 +1364,11 @@ CAIRO_GAL::CAIRO_GAL( GAL_DISPLAY_OPTIONS& aDisplayOptions, wxWindow* aParent,
     m_currentTarget = TARGET_NONCACHED;
     SetTarget( TARGET_NONCACHED );
 
+#ifdef _WIN32
+    // need to fix broken cairo rendering on Windows with wx 3.3
+    SetDoubleBuffered( false );
+#endif
+
     m_bitmapBuffer = nullptr;
     m_wxOutput = nullptr;