When a surface is backed by an external render target force a copy on image snap

src/gpu/GrResourceCache.cpp

 
 /*
  * Copyright 2014 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 
 #include "GrResourceCache.h"
@@ skipping 129 matching lines @@
         ++fBudgetedCount;
         fBudgetedBytes += size;
         TRACE_COUNTER2(TRACE_DISABLED_BY_DEFAULT("skia.gpu.cache"), "skia budget", "used",
                        fBudgetedBytes, "free", fMaxBytes - fBudgetedBytes);
 #if GR_CACHE_STATS
         fBudgetedHighWaterCount = SkTMax(fBudgetedCount, fBudgetedHighWaterCount);
         fBudgetedHighWaterBytes = SkTMax(fBudgetedBytes, fBudgetedHighWaterBytes);
 #endif
     }
     if (resource->resourcePriv().getScratchKey().isValid()) {
-        SkASSERT(!resource->cacheAccess().isExternal());
+        SkASSERT(!resource->resourcePriv().isExternal());
         fScratchMap.insert(resource->resourcePriv().getScratchKey(), resource);
     }
 
     this->purgeAsNeeded();
 }
 
 void GrResourceCache::removeResource(GrGpuResource* resource) {
     this->validate();
     SkASSERT(this->isInCache(resource));
 
@@ skipping 209 matching lines @@
         SkASSERT(!resource->isPurgeable());
         return;
     }
 
     SkASSERT(resource->isPurgeable());
     this->removeFromNonpurgeableArray(resource);
     fPurgeableQueue.insert(resource);
 
     if (SkBudgeted::kNo == resource->resourcePriv().isBudgeted()) {
         // Check whether this resource could still be used as a scratch resource.
-        if (!resource->cacheAccess().isExternal() &&
+        if (!resource->resourcePriv().isExternal() &&
             resource->resourcePriv().getScratchKey().isValid()) {
             // We won't purge an existing resource to make room for this one.
             if (fBudgetedCount < fMaxCount &&
                 fBudgetedBytes + resource->gpuMemorySize() <= fMaxBytes) {
                 resource->resourcePriv().makeBudgeted();
                 return;
             }
         }
     } else {
         // Purge the resource immediately if we're over budget
@@ skipping 264 matching lines @@
             fBytes += resource->gpuMemorySize();
 
             if (!resource->isPurgeable()) {
                 ++fLocked;
             }
 
             if (resource->cacheAccess().isScratch()) {
                 SkASSERT(!resource->getUniqueKey().isValid());
                 ++fScratch;
                 SkASSERT(fScratchMap->countForKey(resource->resourcePriv().getScratchKey()));
-                SkASSERT(!resource->cacheAccess().isExternal());
+                SkASSERT(!resource->resourcePriv().isExternal());
             } else if (resource->resourcePriv().getScratchKey().isValid()) {
                 SkASSERT(SkBudgeted::kNo == resource->resourcePriv().isBudgeted() ||
                          resource->getUniqueKey().isValid());
                 ++fCouldBeScratch;
                 SkASSERT(fScratchMap->countForKey(resource->resourcePriv().getScratchKey()));
-                SkASSERT(!resource->cacheAccess().isExternal());
+                SkASSERT(!resource->resourcePriv().isExternal());
             }
             const GrUniqueKey& uniqueKey = resource->getUniqueKey();
             if (uniqueKey.isValid()) {
                 ++fContent;
                 SkASSERT(fUniqueHash->find(uniqueKey) == resource);
-                SkASSERT(!resource->cacheAccess().isExternal());
+                SkASSERT(!resource->resourcePriv().isExternal());
                 SkASSERT(SkBudgeted::kYes == resource->resourcePriv().isBudgeted());
             }
 
             if (SkBudgeted::kYes == resource->resourcePriv().isBudgeted()) {
                 ++fBudgetedCount;
                 fBudgetedBytes += resource->gpuMemorySize();
             }
         }
     };
 
@@ skipping 45 matching lines @@
         return true;
     }
     if (index < fNonpurgeableResources.count() && fNonpurgeableResources[index] == resource) {
         return true;
     }
     SkDEBUGFAIL("Resource index should be -1 or the resource should be in the cache.");
     return false;
 }
 
 #endif