From 71c0318322ce998ea411f343607de524b2058799 Mon Sep 17 00:00:00 2001
From: cku <cku@mozilla.com>
Date: Fri, 28 Apr 2017 11:48:21 +0800
Subject: Bug 1360343 - ensure maskSurface is not null before dereference,
 since it can be null because of OOM or gfx device reset. r=dvander

MozReview-Commit-ID: HX2qsWLZpMg

--HG--
extra : rebase_source : 046befc11151461a682842c31e2ce39247a5e1d8
---
 gfx/2d/2D.h | 3 +++
 1 file changed, 3 insertions(+)

(limited to 'gfx')

diff --git a/gfx/2d/2D.h b/gfx/2d/2D.h
index c1fba3463..e2020dc9e 100644
--- a/gfx/2d/2D.h
+++ b/gfx/2d/2D.h
@@ -488,6 +488,9 @@ public:
   /**
    * Returns a DataSourceSurface with the same data as this one, but
    * guaranteed to have surface->GetType() == SurfaceType::DATA.
+   *
+   * The returning surface might be null, because of OOM or gfx device reset.
+   * The caller needs to do null-check before using it.
    */
   virtual already_AddRefed<DataSourceSurface> GetDataSurface() override;
 
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