From 715608fe6ab2a746eed112036f41f62d7d9dbaa7 Mon Sep 17 00:00:00 2001
From: arturs <arturs@trac.wxwidgets.org>
Date: Sun, 2 Jul 2017 15:06:06 +0200
Subject: [PATCH] Return (0,0,0,0) rectangle if clipping region is empty

When clipping region is empty, CGContextGetClipBoundingBox() returns (+Inf,+Inf,0,0) rectangle but we need to return (0,0,0,0) rectangle in this case.

See #17609.
---
 src/osx/carbon/graphics.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/osx/carbon/graphics.cpp b/src/osx/carbon/graphics.cpp
index bc3ef2562e..27feca9780 100644
--- a/src/osx/carbon/graphics.cpp
+++ b/src/osx/carbon/graphics.cpp
@@ -1925,6 +1925,11 @@ void wxMacCoreGraphicsContext::GetClipBox(wxDouble* x, wxDouble* y, wxDouble* w,
     // wxFAIL_MSG( "Needs a valid context for clipping" );
 #endif
     }
+
+    if ( CGRectIsEmpty(r) )
+    {
+        r = CGRectZero;
+    }
     CheckInvariants();
 
     if ( x )