From dc9d933d81646b53edab245eb8f96b1e82ba752f Mon Sep 17 00:00:00 2001
From: wolfbeast <mcwerewolf@gmail.com>
Date: Sat, 14 Jul 2018 07:45:06 +0200
Subject: Add pref to control CanOptimizeToImageLayer for large downscale
 factors.

This resolves #626
---
 layout/base/nsDisplayList.cpp | 5 +++++
 1 file changed, 5 insertions(+)

(limited to 'layout/base')

diff --git a/layout/base/nsDisplayList.cpp b/layout/base/nsDisplayList.cpp
index 8035269e3..cb55bb2da 100644
--- a/layout/base/nsDisplayList.cpp
+++ b/layout/base/nsDisplayList.cpp
@@ -3513,6 +3513,11 @@ nsDisplayImageContainer::CanOptimizeToImageLayer(LayerManager* aManager,
     return false;
   }
 
+  if (gfxPrefs::ImageLayerizeAlways()) {
+    // If the user decides to trade off quality for performance, so be it!
+    return true;
+  }
+  
   const int32_t factor = mFrame->PresContext()->AppUnitsPerDevPixel();
   const LayoutDeviceRect destRect =
     LayoutDeviceRect::FromAppUnits(GetDestRect(), factor);
-- 
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