From ae57d89df842af526b8aaa20d90b4a05eb1c19d1 Mon Sep 17 00:00:00 2001
From: Artur Wieczorek <artwik@wp.pl>
Date: Thu, 2 Mar 2017 22:20:53 +0100
Subject: [PATCH] Fix updating bounding box in DrawSpline() implementation in
 wxMSWDC

All spline points have to be added to the bounding box.

Closes #17814.
---
 src/msw/dc.cpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/msw/dc.cpp b/src/msw/dc.cpp
index 07a8ded1f5..b7c8e9dd49 100644
--- a/src/msw/dc.cpp
+++ b/src/msw/dc.cpp
@@ -1114,6 +1114,7 @@ void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
     bezier_pos++;
     lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
     bezier_pos++;
+    CalcBoundingBox(x1, y1);
 
     node = node->GetNext();
     p = node->GetData();
@@ -1127,6 +1128,7 @@ void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
     bezier_pos++;
     lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];
     bezier_pos++;
+    CalcBoundingBox(x2, y2);
 
 #if !wxUSE_STD_CONTAINERS
     while ((node = node->GetNext()) != NULL)
@@ -1156,6 +1158,8 @@ void wxMSWDCImpl::DoDrawSpline(const wxPointList *points)
         bezier_pos++;
         cx1 = cx4;
         cy1 = cy4;
+
+        CalcBoundingBox(x2, y2);
     }
 
     lppt[ bezier_pos ] = lppt[ bezier_pos-1 ];