From 8ac3a181aac7b5131bc7ca9de02159e03b78c643 Mon Sep 17 00:00:00 2001
From: Steven Kirk <grokys@gmail.com>
Date: Sun, 20 Aug 2017 19:49:19 +0200
Subject: [PATCH] Allow for a null PlatformBrush in
 DrawingContextImpl.DrawImage

Fixes #1119
---
 src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs b/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs
index 0b46ba1c47..69b582b009 100644
--- a/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs
+++ b/src/Windows/Avalonia.Direct2D1/Media/DrawingContextImpl.cs
@@ -119,7 +119,10 @@ namespace Avalonia.Direct2D1.Media
             using (var d2dOpacityMask = CreateBrush(opacityMask, opacityMaskRect.Size))
             using (var geometry = new SharpDX.Direct2D1.RectangleGeometry(_renderTarget.Factory, destRect.ToDirect2D()))
             {
-                d2dOpacityMask.PlatformBrush.Transform = Matrix.CreateTranslation(opacityMaskRect.Position).ToDirect2D();
+                if (d2dOpacityMask.PlatformBrush != null)
+                {
+                    d2dOpacityMask.PlatformBrush.Transform = Matrix.CreateTranslation(opacityMaskRect.Position).ToDirect2D();
+                }
 
                 _renderTarget.FillGeometry(
                     geometry,