detect if the scaledimagecache returns a purged bitmap

src/core/SkScaledImageCache.h

Index: src/core/SkScaledImageCache.h
diff --git a/src/core/SkScaledImageCache.h b/src/core/SkScaledImageCache.h
index 311db325be887ccddfa36b6790c0639387271786..b20be071197f51043db11eeb3b64fad8e43d4ad2 100644
--- a/src/core/SkScaledImageCache.h
+++ b/src/core/SkScaledImageCache.h
@@ -66,6 +66,8 @@ public:
 
     static SkBitmap::Allocator* GetAllocator();
 
+    static void Dump();
+
     ///////////////////////////////////////////////////////////////////////////
 
     /**
@@ -151,6 +153,8 @@ public:
 
     SkBitmap::Allocator* allocator() const { return fAllocator; };
 
+    void dump() const;

[scroggo, 2013/12/12 20:34:55]

Can you add some comments? I see "dump" and I'm not sure whether it means debug
dump or purge.

Also, should it be only defined in SK_DEBUG?

[reed1, 2013/12/12 21:13:49]

Not sure. SkPath has a dump() that works in release mode, and I have used it
from with a debugger, to examine the path.

+
 public:
     struct Rec;
     struct Key;
@@ -174,6 +178,7 @@ private:
     Rec* findAndLock(const Key& key);
     ID* addAndLock(Rec* rec);
 
+    void purgeRec(Rec*);
     void purgeAsNeeded();
 
     // linklist management