Restructure flushing relationship between GrContext, GrDrawingManager, and GrResourceCache.

src/gpu/GrDrawingManager.cpp

 /*
  * Copyright 2015 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
+#include "GrDrawingManager.h"
+
+#include "GrContext.h"
 #include "GrDrawContext.h"
-#include "GrDrawingManager.h"
 #include "GrDrawTarget.h"
 #include "GrPathRenderingDrawContext.h"
 #include "GrResourceProvider.h"
 #include "GrSoftwarePathRenderer.h"
 #include "SkSurface_Gpu.h"
 #include "SkTTopoSort.h"
 
 #include "instanced/InstancedRendering.h"
 
 #include "text/GrAtlasTextContext.h"
@@ skipping 47 matching lines @@
     }
 }
 
 void GrDrawingManager::reset() {
     for (int i = 0; i < fDrawTargets.count(); ++i) {
         fDrawTargets[i]->reset();
     }
     fFlushState.reset();
 }
 
-bool GrDrawingManager::flush() {
+void GrDrawingManager::internalFlush(GrResourceCache::FlushType type) {
     if (fFlushing || this->wasAbandoned()) {
-        return false;
+        return;
     }
     fFlushing = true;
     bool flushed = false;
     SkDEBUGCODE(bool result =)
                         SkTTopoSort<GrDrawTarget, GrDrawTarget::TopoSortTraits>(&fDrawTargets);
     SkASSERT(result);
 
     for (int i = 0; i < fDrawTargets.count(); ++i) {
         fDrawTargets[i]->prepareBatches(&fFlushState);
     }
@@ skipping 29 matching lines @@
         SkASSERT(fDrawTargets.count() == 1);
         // Clear out this flag so the topological sort's SkTTopoSort_CheckAllUnmarked check
         // won't bark
         fDrawTargets[0]->resetFlag(GrDrawTarget::kWasOutput_Flag);
     }
 #else
     fDrawTargets.reset();
 #endif
 
     fFlushState.reset();
+    // We always have to notify the cache when it requested a flush so it can reset its state.
+    if (flushed || type == GrResourceCache::FlushType::kCacheRequested) {
+        fContext->getResourceCache()->notifyFlushOccurred(type);
+    }
     fFlushing = false;
-    return flushed;
 }
 
 GrDrawTarget* GrDrawingManager::newDrawTarget(GrRenderTarget* rt) {
     SkASSERT(fContext);
 
 #ifndef ENABLE_MDB
     // When MDB is disabled we always just return the single drawTarget
     if (fDrawTargets.count()) {
         SkASSERT(fDrawTargets.count() == 1);
         // In the non-MDB-world the same drawTarget gets reused for multiple render targets.
@@ skipping 75 matching lines @@
                                                         std::move(colorSpace), surfaceProps,
                                                         fContext->getAuditTrail(), fSingleOwner));
         }
     }
 
     return sk_sp<GrDrawContext>(new GrDrawContext(fContext, this, std::move(rt),
                                                   std::move(colorSpace), surfaceProps,
                                                   fContext->getAuditTrail(),
                                                   fSingleOwner));
 }