Fix issue incremental upload can evict textures being drawn

cc/CCThreadProxy.cpp

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "config.h"
 
 #include "CCThreadProxy.h"
 
 #include "CCDelayBasedTimeSource.h"
 #include "CCDrawQuad.h"
@@ skipping 33 matching lines @@
     , m_layerTreeHost(layerTreeHost)
     , m_rendererInitialized(false)
     , m_started(false)
     , m_texturesAcquired(true)
     , m_inCompositeAndReadback(false)
     , m_mainThreadProxy(CCScopedThreadProxy::create(CCProxy::mainThread()))
     , m_beginFrameCompletionEventOnImplThread(0)
     , m_readbackRequestOnImplThread(0)
     , m_commitCompletionEventOnImplThread(0)
     , m_textureAcquisitionCompletionEventOnImplThread(0)
-    , m_resetContentsTexturesPurgedAfterCommitOnImplThread(false)
     , m_nextFrameIsNewlyCommittedFrameOnImplThread(false)
     , m_renderVSyncEnabled(layerTreeHost->settings().renderVSyncEnabled)
     , m_totalCommitCount(0)
 {
     TRACE_EVENT0("cc", "CCThreadProxy::CCThreadProxy");
     ASSERT(isMainThread());
 }
 
 CCThreadProxy::~CCThreadProxy()
 {
@@ skipping 282 matching lines @@
 {
     ASSERT(isImplThread());
     TRACE_EVENT0("cc", "CCThreadProxy::postAnimationEventsToMainThreadOnImplThread");
     m_mainThreadProxy->postTask(createCCThreadTask(this, &CCThreadProxy::setAnimationEvents, events, wallClockTime));
 }
 
 void CCThreadProxy::releaseContentsTexturesOnImplThread()
 {
     ASSERT(isImplThread());
 
-    m_layerTreeHost->reduceContentsTexturesMemoryOnImplThread(0, m_layerTreeHostImpl->resourceProvider());
+    if (m_layerTreeHost->contentsTextureManager()) 
+        m_layerTreeHost->contentsTextureManager()->reduceMemoryOnImplThread(0, m_layerTreeHostImpl->resourceProvider());
 
-    // Make sure that we get a new commit before drawing again.
-    m_resetContentsTexturesPurgedAfterCommitOnImplThread = false;
     // The texture upload queue may reference textures that were just purged, clear
     // them from the queue.
-    if (m_currentTextureUpdateControllerOnImplThread.get() && m_layerTreeHost->evictedContentsTexturesBackingsExist())
+    if (m_currentTextureUpdateControllerOnImplThread.get())
         m_currentTextureUpdateControllerOnImplThread->discardUploadsToEvictedResources();
 }
 
 void CCThreadProxy::setNeedsRedraw()
 {
     ASSERT(isMainThread());
     TRACE_EVENT0("cc", "CCThreadProxy::setNeedsRedraw");
     CCProxy::implThread()->postTask(createCCThreadTask(this, &CCThreadProxy::setFullRootLayerDamageOnImplThread));
     CCProxy::implThread()->postTask(createCCThreadTask(this, &CCThreadProxy::setNeedsRedrawOnImplThread));
 }
@@ skipping 87 matching lines @@
 
 void CCThreadProxy::scheduledActionBeginFrame()
 {
     TRACE_EVENT0("cc", "CCThreadProxy::scheduledActionBeginFrame");
     ASSERT(!m_pendingBeginFrameRequest);
     m_pendingBeginFrameRequest = adoptPtr(new BeginFrameAndCommitState());
     m_pendingBeginFrameRequest->monotonicFrameBeginTime = monotonicallyIncreasingTime();
     m_pendingBeginFrameRequest->scrollInfo = m_layerTreeHostImpl->processScrollDeltas();
     m_pendingBeginFrameRequest->implTransform = m_layerTreeHostImpl->implTransform();
     m_pendingBeginFrameRequest->memoryAllocationLimitBytes = m_layerTreeHostImpl->memoryAllocationLimitBytes();
-    m_layerTreeHost->getEvictedContentTexturesBackings(m_pendingBeginFrameRequest->evictedContentsTexturesBackings);
+    if (m_layerTreeHost->contentsTextureManager())
+         m_layerTreeHost->contentsTextureManager()->getEvictedBackings(m_pendingBeginFrameRequest->evictedContentsTexturesBackings);
 
     m_mainThreadProxy->postTask(createCCThreadTask(this, &CCThreadProxy::beginFrame));
 
     if (m_beginFrameCompletionEventOnImplThread) {
         m_beginFrameCompletionEventOnImplThread->signal();
         m_beginFrameCompletionEventOnImplThread = 0;
     }
 }
 
 void CCThreadProxy::beginFrame()
@@ skipping 51 matching lines @@
     // updateLayers.
     m_commitRequested = false;
     m_commitRequestSentToImplThread = false;
     m_forcedCommitRequested = false;
 
     if (!m_layerTreeHost->initializeRendererIfNeeded()) {
         TRACE_EVENT0("cc", "EarlyOut_InitializeFailed");
         return;
     }
 
-    m_layerTreeHost->unlinkEvictedContentTexturesBackings(request->evictedContentsTexturesBackings);
+    m_layerTreeHost->contentsTextureManager()->unlinkEvictedBackings(request->evictedContentsTexturesBackings);
 
     OwnPtr<CCTextureUpdateQueue> queue = adoptPtr(new CCTextureUpdateQueue);
     m_layerTreeHost->updateLayers(*(queue.get()), request->memoryAllocationLimitBytes);
 
     // Once single buffered layers are committed, they cannot be modified until
     // they are drawn by the impl thread.
     m_texturesAcquired = false;
 
     m_layerTreeHost->willCommit();
     // Before applying scrolls and calling animate, we set m_animateRequested to
@@ skipping 37 matching lines @@
     ASSERT(isImplThread() && isMainThreadBlocked());
     ASSERT(m_schedulerOnImplThread);
     ASSERT(m_schedulerOnImplThread->commitPending());
 
     if (!m_layerTreeHostImpl.get()) {
         TRACE_EVENT0("cc", "EarlyOut_NoLayerTree");
         completion->signal();
         return;
     }
 
-    // Clear any uploads we were making to textures linked to evicted
-    // resources
-    if (m_layerTreeHost->evictedContentsTexturesBackingsExist())
+    if (m_layerTreeHost->contentsTextureManager()->linkedEvictedBackingsExist()) {
+        // Clear any uploads we were making to textures linked to evicted
+        // resources
         queue->clearUploadsToEvictedResources();
+        // Some textures in the layer tree are invalid. Kick off another commit
+        // to fill them again.
+        setNeedsCommitOnImplThread();
+    }
 
-    // If we unlinked evicted textures on the main thread, delete them now.
-    if (m_layerTreeHost->deleteEvictedContentTexturesBackings()) {
-        // Deleting the evicted textures' backings resulted in some textures in the
-        // layer tree being invalidated (unliked from their backings). Kick off
-        // another commit to fill them again.
-        setNeedsCommitOnImplThread();
-    } else {
-        // The layer tree does not reference evicted textures, so mark that we
-        // can draw this tree once this commit is complete.
-        if (m_layerTreeHostImpl->contentsTexturesPurged())
-            m_resetContentsTexturesPurgedAfterCommitOnImplThread = true;
-    }
+    m_layerTreeHost->contentsTextureManager()->pushTexturePrioritiesToBackings();
 
     m_currentTextureUpdateControllerOnImplThread = CCTextureUpdateController::create(this, CCProxy::implThread(), queue, m_layerTreeHostImpl->resourceProvider(), m_layerTreeHostImpl->resourceProvider()->textureUploader());
     m_currentTextureUpdateControllerOnImplThread->performMoreUpdates(
         m_schedulerOnImplThread->anticipatedDrawTime());
 
     m_commitCompletionEventOnImplThread = completion;
 }
 
 void CCThreadProxy::beginFrameAbortedOnImplThread()
 {
     TRACE_EVENT0("cc", "CCThreadProxy::beginFrameAbortedOnImplThread");
     ASSERT(isImplThread());
     ASSERT(m_schedulerOnImplThread);
     ASSERT(m_schedulerOnImplThread->commitPending());
 
     m_schedulerOnImplThread->beginFrameAborted();
 }
 
 void CCThreadProxy::scheduledActionCommit()
 {
     TRACE_EVENT0("cc", "CCThreadProxy::scheduledActionCommit");
     ASSERT(isImplThread());
     ASSERT(m_commitCompletionEventOnImplThread);
     ASSERT(m_currentTextureUpdateControllerOnImplThread);
 
     // Complete all remaining texture updates.
     m_currentTextureUpdateControllerOnImplThread->finalize();
     m_currentTextureUpdateControllerOnImplThread.clear();
 
+    // If there are linked evicted backings, these backings' resources may be put into the
+    // impl tree, so we can't draw yet. Determine this before clearing all evicted backings.
+    bool newImplTreeHasNoEvictedResources = !m_layerTreeHost->contentsTextureManager()->linkedEvictedBackingsExist();
+
     m_layerTreeHostImpl->beginCommit();
-
     m_layerTreeHost->beginCommitOnImplThread(m_layerTreeHostImpl.get());
     m_layerTreeHost->finishCommitOnImplThread(m_layerTreeHostImpl.get());
 
-    if (m_resetContentsTexturesPurgedAfterCommitOnImplThread) {
-        m_resetContentsTexturesPurgedAfterCommitOnImplThread = false;
-        m_layerTreeHostImpl->resetContentsTexturesPurged();
+    if (newImplTreeHasNoEvictedResources) {
+        if (m_layerTreeHostImpl->contentsTexturesPurged())
+            m_layerTreeHostImpl->resetContentsTexturesPurged();
     }
 
     m_layerTreeHostImpl->commitComplete();
 
     m_nextFrameIsNewlyCommittedFrameOnImplThread = true;
 
     m_commitCompletionEventOnImplThread->signal();
     m_commitCompletionEventOnImplThread = 0;
 
     // SetVisible kicks off the next scheduler action, so this must be last.
@@ skipping 281 matching lines @@
 CCThreadProxy::BeginFrameAndCommitState::BeginFrameAndCommitState()
     : monotonicFrameBeginTime(0)
 {
 }
 
 CCThreadProxy::BeginFrameAndCommitState::~BeginFrameAndCommitState()
 {
 }
 
 } // namespace cc