From 70f0900799b670107982d683cecf216453fc67fe Mon Sep 17 00:00:00 2001
From: Vadim Zeitlin <vadim@wxwidgets.org>
Date: Fri, 9 Aug 2019 23:28:53 +0200
Subject: [PATCH] Use white background when rendering print preview

Explicitly use the white brush when erasing background of the bitmap
used for print preview, to match the printed page appearance. Somehow it
worked even without this under other platforms before, but logically
resulted in black background under wxGTK 3.

Closes https://github.com/wxWidgets/wxWidgets/pull/1476

Closes #18371.
---
 src/common/prntbase.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/common/prntbase.cpp b/src/common/prntbase.cpp
index dd52c006d8..3ee6ee2144 100644
--- a/src/common/prntbase.cpp
+++ b/src/common/prntbase.cpp
@@ -2054,6 +2054,7 @@ bool wxPrintPreviewBase::RenderPageIntoBitmap(wxBitmap& bmp, int pageNum)
 {
     wxMemoryDC memoryDC;
     memoryDC.SelectObject(bmp);
+    memoryDC.SetBackground(*wxWHITE_BRUSH);
     memoryDC.Clear();
 
     return RenderPageIntoDC(memoryDC, pageNum);