From 320acc1796c935e0eaf29da68f437eb7bf72a3cb Mon Sep 17 00:00:00 2001
From: Robin Dunn <>
Date: Wed, 7 Aug 2019 15:38:28 -0700
Subject: [PATCH] Only clone the gradient's matrix when there is one

---
 src/osx/carbon/graphics.cpp | 15 +++++++++++----
 1 file changed, 11 insertions(+), 4 deletions(-)

diff --git a/src/osx/carbon/graphics.cpp b/src/osx/carbon/graphics.cpp
index 2614051455..5e2c89e3d7 100644
--- a/src/osx/carbon/graphics.cpp
+++ b/src/osx/carbon/graphics.cpp
@@ -475,6 +475,7 @@ void * wxMacCoreGraphicsMatrixData::GetNativeMatrix() const
 }
 
 
+
 // ----------------------------------------------------------------------------
 // Pen and Brush common data. Base class for information shared between pens and
 // brushes, basically just the things needed for gradient support.
@@ -587,8 +588,11 @@ wxMacCoreGraphicsPenBrushDataBase::CreateLinearGradientShading(
                                       CGPointMake((CGFloat) x2, (CGFloat) y2), 
                                       m_gradientFunction, true, true );
     m_isShading = true;
-    m_shadingMatrix = (wxMacCoreGraphicsMatrixData*)((wxMacCoreGraphicsMatrixData*)matrix.GetRefData())->Clone();
-    m_shadingMatrix->Invert();
+    if (! matrix.IsNull() )
+    {
+        m_shadingMatrix = (wxMacCoreGraphicsMatrixData*)((wxMacCoreGraphicsMatrixData*)matrix.GetRefData())->Clone();
+        m_shadingMatrix->Invert();
+    }
 }
 
 void
@@ -605,8 +609,11 @@ wxMacCoreGraphicsPenBrushDataBase::CreateRadialGradientShading(
                                        CGPointMake((CGFloat) xc, (CGFloat) yc), (CGFloat) radius, 
                                        m_gradientFunction, true, true );
     m_isShading = true;
-    m_shadingMatrix = (wxMacCoreGraphicsMatrixData*)((wxMacCoreGraphicsMatrixData*)matrix.GetRefData())->Clone();
-    m_shadingMatrix->Invert();
+    if (! matrix.IsNull() )
+    {
+        m_shadingMatrix = (wxMacCoreGraphicsMatrixData*)((wxMacCoreGraphicsMatrixData*)matrix.GetRefData())->Clone();
+        m_shadingMatrix->Invert();
+    }
 }
 
 void wxMacCoreGraphicsPenBrushDataBase::CalculateShadingValues(void *info, const CGFloat *in, CGFloat *out)