Allow GPU resources to not be counted against the cache budget.

src/gpu/GrGpuResourceCacheAccess.h

Index: src/gpu/GrGpuResourceCacheAccess.h
diff --git a/src/gpu/GrGpuResourceCacheAccess.h b/src/gpu/GrGpuResourceCacheAccess.h
index ecb73f37eca21fbbccfb3eb19d8967e84f821702..7742aef5b03dab7c4191543097479f7a2aebcad5 100644
--- a/src/gpu/GrGpuResourceCacheAccess.h
+++ b/src/gpu/GrGpuResourceCacheAccess.h
@@ -29,6 +29,11 @@ public:
     }
 
     /**
+     * Changes whether the resource counts against the resource cache budget.
+     */
+    void setBudgeted(bool countsAgainstBudget) { fResource->setBudgeted(countsAgainstBudget); }

[bsalomon, 2014/11/13 19:20:54]

This class provides privileged access the parts of GrGpuResource that deal with
the cache. It exists for code in src/gpu to manipulate caching without allowing
that state to be manipulated outside Skia.

I've added this function to control whether a resource is budgeted and a query
below.

+
+    /**
      * Is the resource currently cached as scratch? This means it has a valid scratch key and does
      * not have a content key.
      */
@@ -48,14 +53,26 @@ public:
      * If the resource is currently cached by a content key, the key is returned, otherwise NULL.
      */
     const GrResourceKey* getContentKey() const {
-        if (fResource->fContentKeySet) {
+        if (fResource->fFlags & GrGpuResource::kContentKeySet_Flag) {
             return &fResource->fContentKey;
         }
         return NULL;
     }
 
+    /**
+     * Is the resource object wrapping an externally allocated GPU resource?
+     */
     bool isWrapped() const { return fResource->isWrapped(); }
 
+    /**
+     * Does the resource count against the resource budget?
+     */
+    bool isBudgeted() const { 
+        bool ret = SkToBool(GrGpuResource::kBudgeted_Flag & fResource->fFlags);
+        SkASSERT(!(ret && fResource->isWrapped()));
+        return ret;
+    }
+
 private:
     CacheAccess(GrGpuResource* resource) : fResource(resource) { }
     CacheAccess(const CacheAccess& that) : fResource(that.fResource) { }