From 79d583db148c692e2d47188192f44a4ff95dfd1e Mon Sep 17 00:00:00 2001
From: Sotaro Ikeda <sikeda@mozilla.com>
Date: Thu, 4 Sep 2014 10:28:43 -0700
Subject: [PATCH] Bug 1061943 - Purge all GradientCache on memory-pressure
 r=jrmuizel

---
 gfx/thebes/gfxGradientCache.cpp | 8 ++++++++
 gfx/thebes/gfxGradientCache.h   | 1 +
 gfx/thebes/gfxPlatform.cpp      | 1 +
 3 files changed, 10 insertions(+)

diff --git a/gfx/thebes/gfxGradientCache.cpp b/gfx/thebes/gfxGradientCache.cpp
index 5676bef09523..5bfbb71c2c9e 100644
--- a/gfx/thebes/gfxGradientCache.cpp
+++ b/gfx/thebes/gfxGradientCache.cpp
@@ -207,6 +207,14 @@ gfxGradientCache::GetOrCreateGradientStops(DrawTarget *aDT, nsTArray<GradientSto
   return gs;
 }
 
+void
+gfxGradientCache::PurgeAllCaches()
+{
+  if (gGradientCache) {
+    gGradientCache->AgeAllGenerations();
+  }
+}
+
 void
 gfxGradientCache::Shutdown()
 {
diff --git a/gfx/thebes/gfxGradientCache.h b/gfx/thebes/gfxGradientCache.h
index 1453610e6cb5..b783d15ff83d 100644
--- a/gfx/thebes/gfxGradientCache.h
+++ b/gfx/thebes/gfxGradientCache.h
@@ -26,6 +26,7 @@ public:
                              nsTArray<gfx::GradientStop>& aStops,
                              gfx::ExtendMode aExtend);
 
+    static void PurgeAllCaches();
     static void Shutdown();
 };
 
diff --git a/gfx/thebes/gfxPlatform.cpp b/gfx/thebes/gfxPlatform.cpp
index df3aacefa09e..ac800edd5238 100644
--- a/gfx/thebes/gfxPlatform.cpp
+++ b/gfx/thebes/gfxPlatform.cpp
@@ -220,6 +220,7 @@ MemoryPressureObserver::Observe(nsISupports *aSubject,
 {
     NS_ASSERTION(strcmp(aTopic, "memory-pressure") == 0, "unexpected event topic");
     Factory::PurgeAllCaches();
+    gfxGradientCache::PurgeAllCaches();
 
     gfxPlatform::GetPlatform()->PurgeSkiaCache();
     return NS_OK;