From ea69eeb1932574a68e6c184c8171c873290c3209 Mon Sep 17 00:00:00 2001
From: peter chang <pchang@mozilla.com>
Date: Fri, 16 Dec 2016 13:55:22 +0800
Subject: [PATCH] Bug 1323837 - Draw nothing if there are no color stops for
 gradient effect, r=bas

MozReview-Commit-ID: BnZlh2NhdHX

--HG--
extra : rebase_source : e221cebdb64e55926c63fd105df0a55635b28e19
---
 gfx/2d/DrawTargetD2D1.cpp | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/gfx/2d/DrawTargetD2D1.cpp b/gfx/2d/DrawTargetD2D1.cpp
index b54c1b8ce761..44c6de1e0a81 100644
--- a/gfx/2d/DrawTargetD2D1.cpp
+++ b/gfx/2d/DrawTargetD2D1.cpp
@@ -1380,6 +1380,11 @@ DrawTargetD2D1::FinalizeDrawing(CompositionOp aOp, const Pattern &aPattern)
     return;
   }
 
+  if (!pat->mStops) {
+    // Draw nothing because of no color stops
+    return;
+  }
+
   RefPtr<ID2D1Effect> radialGradientEffect;
 
   HRESULT hr = mDC->CreateEffect(CLSID_RadialGradientEffect, getter_AddRefs(radialGradientEffect));