Layer changes

Bug: 17208461

* Switch Layer to be VirtualLightRefBase instead of
  Caches' side-channel ref-counting
* Include active layers in gfxinfo dump
* Run gfxinfo dump on the correct thread
* Dump gfxinfo on Layer creation failure

Change-Id: I28d195699e2334518e215ab28c7a17355aee9678

26 files changed, 163 insertions, 188 deletions

diff --git a/core/jni/android_view_GLES20Canvas.cpp b/core/jni/android_view_GLES20Canvas.cpp
index 2e2b23f..9bdc6b5 100644
--- a/core/jni/android_view_GLES20Canvas.cpp
+++ b/core/jni/android_view_GLES20Canvas.cpp
@@ -43,6 +43,7 @@
 #include <RenderNode.h>
 #include <CanvasProperty.h>
 #include <Paint.h>
+#include <renderthread/RenderProxy.h>
 
 #include "MinikinUtils.h"
 
@@ -861,7 +862,7 @@ static void
 android_app_ActivityThread_dumpGraphics(JNIEnv* env, jobject clazz, jobject javaFileDescriptor) {
 #ifdef USE_OPENGL_RENDERER
     int fd = jniGetFDFromFileDescriptor(env, javaFileDescriptor);
-    android::uirenderer::RenderNode::outputLogBuffer(fd);
+    android::uirenderer::renderthread::RenderProxy::outputLogBuffer(fd);
 #endif // USE_OPENGL_RENDERER
 }
 
diff --git a/libs/hwui/Caches.cpp b/libs/hwui/Caches.cpp
index f0bf7b2..ad50894 100644
--- a/libs/hwui/Caches.cpp
+++ b/libs/hwui/Caches.cpp
@@ -265,14 +265,27 @@ void Caches::dumpMemoryUsage() {
 }
 
 void Caches::dumpMemoryUsage(String8 &log) {
+    uint32_t total = 0;
     log.appendFormat("Current memory usage / total memory usage (bytes):\n");
     log.appendFormat("  TextureCache         %8d / %8d\n",
             textureCache.getSize(), textureCache.getMaxSize());
     log.appendFormat("  LayerCache           %8d / %8d (numLayers = %zu)\n",
             layerCache.getSize(), layerCache.getMaxSize(), layerCache.getCount());
-    log.appendFormat("  Garbage layers       %8zu\n", mLayerGarbage.size());
-    log.appendFormat("  Active layers        %8zu\n",
-            mRenderState ? mRenderState->mActiveLayers.size() : 0);
+    if (mRenderState) {
+        int memused = 0;
+        for (std::set<const Layer*>::iterator it = mRenderState->mActiveLayers.begin();
+                it != mRenderState->mActiveLayers.end(); it++) {
+            const Layer* layer = *it;
+            log.appendFormat("    Layer size %dx%d; isTextureLayer()=%d; texid=%u fbo=%u; refs=%d\n",
+                    layer->getWidth(), layer->getHeight(),
+                    layer->isTextureLayer(), layer->getTexture(),
+                    layer->getFbo(), layer->getStrongCount());
+            memused = layer->getWidth() * layer->getHeight() * 4;
+        }
+        log.appendFormat("  Layers total   %8d (numLayers = %zu)\n",
+                memused, mRenderState->mActiveLayers.size());
+        total += memused;
+    }
     log.appendFormat("  RenderBufferCache    %8d / %8d\n",
             renderBufferCache.getSize(), renderBufferCache.getMaxSize());
     log.appendFormat("  GradientCache        %8d / %8d\n",
@@ -297,9 +310,7 @@ void Caches::dumpMemoryUsage(String8 &log) {
     log.appendFormat("  FboCache             %8d / %8d\n",
             fboCache.getSize(), fboCache.getMaxSize());
 
-    uint32_t total = 0;
     total += textureCache.getSize();
-    total += layerCache.getSize();
     total += renderBufferCache.getSize();
     total += gradientCache.getSize();
     total += pathCache.getSize();
@@ -323,27 +334,6 @@ void Caches::clearGarbage() {
     textureCache.clearGarbage();
     pathCache.clearGarbage();
     patchCache.clearGarbage();
-
-    Vector<Layer*> layers;
-
-    { // scope for the lock
-        Mutex::Autolock _l(mGarbageLock);
-        layers = mLayerGarbage;
-        mLayerGarbage.clear();
-    }
-
-    size_t count = layers.size();
-    for (size_t i = 0; i < count; i++) {
-        Layer* layer = layers.itemAt(i);
-        delete layer;
-    }
-    layers.clear();
-}
-
-void Caches::deleteLayerDeferred(Layer* layer) {
-    Mutex::Autolock _l(mGarbageLock);
-    layer->state = Layer::kState_InGarbageList;
-    mLayerGarbage.push(layer);
 }
 
 void Caches::flush(FlushMode mode) {
diff --git a/libs/hwui/DeferredLayerUpdater.cpp b/libs/hwui/DeferredLayerUpdater.cpp
index a6d7e78..d02455c 100644
--- a/libs/hwui/DeferredLayerUpdater.cpp
+++ b/libs/hwui/DeferredLayerUpdater.cpp
@@ -24,25 +24,6 @@
 namespace android {
 namespace uirenderer {
 
-class DeleteLayerTask : public renderthread::RenderTask {
-public:
-    DeleteLayerTask(renderthread::EglManager& eglManager, Layer* layer)
-        : mEglManager(eglManager)
-        , mLayer(layer)
-    {}
-
-    virtual void run() {
-        mEglManager.requireGlContext();
-        LayerRenderer::destroyLayer(mLayer);
-        mLayer = 0;
-        delete this;
-    }
-
-private:
-    renderthread::EglManager& mEglManager;
-    Layer* mLayer;
-};
-
 DeferredLayerUpdater::DeferredLayerUpdater(renderthread::RenderThread& thread, Layer* layer)
         : mSurfaceTexture(0)
         , mTransform(0)
@@ -62,7 +43,7 @@ DeferredLayerUpdater::DeferredLayerUpdater(renderthread::RenderThread& thread, L
 DeferredLayerUpdater::~DeferredLayerUpdater() {
     SkSafeUnref(mColorFilter);
     setTransform(0);
-    mRenderThread.queue(new DeleteLayerTask(mRenderThread.eglManager(), mLayer));
+    mLayer->postDecStrong();
     mLayer = 0;
 }
 
diff --git a/libs/hwui/DisplayList.cpp b/libs/hwui/DisplayList.cpp
index d8932ce..4a927cf 100644
--- a/libs/hwui/DisplayList.cpp
+++ b/libs/hwui/DisplayList.cpp
@@ -61,10 +61,6 @@ void DisplayListData::cleanupResources() {
         caches.resourceCache.decrementRefcountLocked(sourcePaths.itemAt(i));
     }
 
-    for (size_t i = 0; i < layers.size(); i++) {
-        caches.resourceCache.decrementRefcountLocked(layers.itemAt(i));
-    }
-
     caches.resourceCache.unlock();
 
     for (size_t i = 0; i < paints.size(); i++) {
@@ -86,7 +82,6 @@ void DisplayListData::cleanupResources() {
     paints.clear();
     regions.clear();
     paths.clear();
-    layers.clear();
 }
 
 size_t DisplayListData::addChild(DrawRenderNodeOp* op) {
diff --git a/libs/hwui/DisplayList.h b/libs/hwui/DisplayList.h
index dea109c..cb8a8d1 100644
--- a/libs/hwui/DisplayList.h
+++ b/libs/hwui/DisplayList.h
@@ -147,7 +147,6 @@ public:
     Vector<const SkPath*> paths;
     SortedVector<const SkPath*> sourcePaths;
     Vector<const SkRegion*> regions;
-    Vector<Layer*> layers;
     Vector<Functor*> functors;
 
     const Vector<Chunk>& getChunks() const {
@@ -157,11 +156,7 @@ public:
     size_t addChild(DrawRenderNodeOp* childOp);
     const Vector<DrawRenderNodeOp*>& children() { return mChildren; }
 
-    void refProperty(CanvasPropertyPrimitive* prop) {
-        mReferenceHolders.push(prop);
-    }
-
-    void refProperty(CanvasPropertyPaint* prop) {
+    void ref(VirtualLightRefBase* prop) {
         mReferenceHolders.push(prop);
     }
 
diff --git a/libs/hwui/DisplayListRenderer.cpp b/libs/hwui/DisplayListRenderer.cpp
index 1f70921..c17dd09 100644
--- a/libs/hwui/DisplayListRenderer.cpp
+++ b/libs/hwui/DisplayListRenderer.cpp
@@ -189,7 +189,7 @@ status_t DisplayListRenderer::drawRenderNode(RenderNode* renderNode, Rect& dirty
 }
 
 status_t DisplayListRenderer::drawLayer(Layer* layer, float x, float y) {
-    layer = refLayer(layer);
+    mDisplayListData->ref(layer);
     addDrawOp(new (alloc()) DrawLayerOp(layer, x, y));
     return DrawGlInfo::kStatusDone;
 }
@@ -280,13 +280,13 @@ status_t DisplayListRenderer::drawRoundRect(
         CanvasPropertyPrimitive* right, CanvasPropertyPrimitive* bottom,
         CanvasPropertyPrimitive* rx, CanvasPropertyPrimitive* ry,
         CanvasPropertyPaint* paint) {
-    mDisplayListData->refProperty(left);
-    mDisplayListData->refProperty(top);
-    mDisplayListData->refProperty(right);
-    mDisplayListData->refProperty(bottom);
-    mDisplayListData->refProperty(rx);
-    mDisplayListData->refProperty(ry);
-    mDisplayListData->refProperty(paint);
+    mDisplayListData->ref(left);
+    mDisplayListData->ref(top);
+    mDisplayListData->ref(right);
+    mDisplayListData->ref(bottom);
+    mDisplayListData->ref(rx);
+    mDisplayListData->ref(ry);
+    mDisplayListData->ref(paint);
     addDrawOp(new (alloc()) DrawRoundRectPropsOp(&left->value, &top->value,
             &right->value, &bottom->value, &rx->value, &ry->value, &paint->value));
     return DrawGlInfo::kStatusDone;
@@ -300,10 +300,10 @@ status_t DisplayListRenderer::drawCircle(float x, float y, float radius, const S
 
 status_t DisplayListRenderer::drawCircle(CanvasPropertyPrimitive* x, CanvasPropertyPrimitive* y,
         CanvasPropertyPrimitive* radius, CanvasPropertyPaint* paint) {
-    mDisplayListData->refProperty(x);
-    mDisplayListData->refProperty(y);
-    mDisplayListData->refProperty(radius);
-    mDisplayListData->refProperty(paint);
+    mDisplayListData->ref(x);
+    mDisplayListData->ref(y);
+    mDisplayListData->ref(radius);
+    mDisplayListData->ref(paint);
     addDrawOp(new (alloc()) DrawCirclePropsOp(&x->value, &y->value,
             &radius->value, &paint->value));
     return DrawGlInfo::kStatusDone;
diff --git a/libs/hwui/DisplayListRenderer.h b/libs/hwui/DisplayListRenderer.h
index 3a3fc3a..901e8f0 100644
--- a/libs/hwui/DisplayListRenderer.h
+++ b/libs/hwui/DisplayListRenderer.h
@@ -267,12 +267,6 @@ private:
         return regionCopy;
     }
 
-    inline Layer* refLayer(Layer* layer) {
-        mDisplayListData->layers.add(layer);
-        mCaches.resourceCache.incrementRefcount(layer);
-        return layer;
-    }
-
     inline const SkBitmap* refBitmap(const SkBitmap* bitmap) {
         // Note that this assumes the bitmap is immutable. There are cases this won't handle
         // correctly, such as creating the bitmap from scratch, drawing with it, changing its
diff --git a/libs/hwui/Layer.cpp b/libs/hwui/Layer.cpp
index b5089aa..b95636b 100644
--- a/libs/hwui/Layer.cpp
+++ b/libs/hwui/Layer.cpp
@@ -35,6 +35,9 @@ Layer::Layer(Type layerType, RenderState& renderState, const uint32_t layerWidth
         , renderState(renderState)
         , texture(caches)
         , type(layerType) {
+    // TODO: This is a violation of Android's typical ref counting, but it
+    // preserves the old inc/dec ref locations. This should be changed...
+    incStrong(0);
     mesh = NULL;
     meshElementCount = 0;
     cacheable = true;
@@ -53,20 +56,14 @@ Layer::Layer(Type layerType, RenderState& renderState, const uint32_t layerWidth
     forceFilter = false;
     deferredList = NULL;
     convexMask = NULL;
-    caches.resourceCache.incrementRefcount(this);
     rendererLightPosDirty = true;
     wasBuildLayered = false;
-    if (!isTextureLayer()) {
-        // track only non-texture layer lifecycles in renderstate,
-        // because texture layers are destroyed via finalizer
-        renderState.registerLayer(this);
-    }
+    renderState.registerLayer(this);
 }
 
 Layer::~Layer() {
-    if (!isTextureLayer()) {
-        renderState.unregisterLayer(this);
-    }
+    renderState.requireGLContext();
+    renderState.unregisterLayer(this);
     SkSafeUnref(colorFilter);
     removeFbo();
     deleteTexture();
@@ -292,5 +289,9 @@ void Layer::render(const OpenGLRenderer& rootRenderer) {
     renderNode = NULL;
 }
 
+void Layer::postDecStrong() {
+    renderState.postDecStrong(this);
+}
+
 }; // namespace uirenderer
 }; // namespace android
diff --git a/libs/hwui/Layer.h b/libs/hwui/Layer.h
index a8e1c26..64d1d12 100644
--- a/libs/hwui/Layer.h
+++ b/libs/hwui/Layer.h
@@ -52,7 +52,7 @@ class DeferStateStruct;
 /**
  * A layer has dimensions and is backed by an OpenGL texture or FBO.
  */
-class Layer {
+class Layer : public VirtualLightRefBase {
 public:
     enum Type {
         kType_Texture,
@@ -280,6 +280,12 @@ public:
     void render(const OpenGLRenderer& rootRenderer);
 
     /**
+     * Posts a decStrong call to the appropriate thread.
+     * Thread-safe.
+     */
+    void postDecStrong();
+
+    /**
      * Bounds of the layer.
      */
     Rect layer;
diff --git a/libs/hwui/LayerCache.cpp b/libs/hwui/LayerCache.cpp
index 833f64b..3033dc6 100644
--- a/libs/hwui/LayerCache.cpp
+++ b/libs/hwui/LayerCache.cpp
@@ -84,7 +84,7 @@ void LayerCache::deleteLayer(Layer* layer) {
                 layer->getFbo());
         mSize -= layer->getWidth() * layer->getHeight() * 4;
         layer->state = Layer::kState_DeletedFromCache;
-        Caches::getInstance().resourceCache.decrementRefcount(layer);
+        layer->decStrong(0);
     }
 }
 
diff --git a/libs/hwui/LayerRenderer.cpp b/libs/hwui/LayerRenderer.cpp
index 103c843..394c647 100644
--- a/libs/hwui/LayerRenderer.cpp
+++ b/libs/hwui/LayerRenderer.cpp
@@ -212,7 +212,7 @@ Layer* LayerRenderer::createRenderLayer(RenderState& renderState, uint32_t width
 
         // Creating a new layer always increment its refcount by 1, this allows
         // us to destroy the layer object if one was created for us
-        Caches::getInstance().resourceCache.decrementRefcount(layer);
+        layer->decStrong(0);
 
         return NULL;
     }
@@ -240,7 +240,7 @@ Layer* LayerRenderer::createRenderLayer(RenderState& renderState, uint32_t width
         if (glGetError() != GL_NO_ERROR) {
             ALOGE("Could not allocate texture for layer (fbo=%d %dx%d)", fbo, width, height);
             renderState.bindFramebuffer(previousFbo);
-            caches.resourceCache.decrementRefcount(layer);
+            layer->decStrong(0);
             return NULL;
         }
     }
@@ -316,7 +316,7 @@ void LayerRenderer::destroyLayer(Layer* layer) {
 
         if (!Caches::getInstance().layerCache.put(layer)) {
             LAYER_RENDERER_LOGD("  Destroyed!");
-            Caches::getInstance().resourceCache.decrementRefcount(layer);
+            layer->decStrong(0);
         } else {
             LAYER_RENDERER_LOGD("  Cached!");
 #if DEBUG_LAYER_RENDERER
@@ -328,14 +328,6 @@ void LayerRenderer::destroyLayer(Layer* layer) {
     }
 }
 
-void LayerRenderer::destroyLayerDeferred(Layer* layer) {
-    if (layer) {
-        LAYER_RENDERER_LOGD("Deferring layer destruction, fbo = %d", layer->getFbo());
-
-        Caches::getInstance().deleteLayerDeferred(layer);
-    }
-}
-
 void LayerRenderer::flushLayer(RenderState& renderState, Layer* layer) {
 #ifdef GL_EXT_discard_framebuffer
     if (!layer) return;
diff --git a/libs/hwui/LayerRenderer.h b/libs/hwui/LayerRenderer.h
index bf7828c..4d8620b 100644
--- a/libs/hwui/LayerRenderer.h
+++ b/libs/hwui/LayerRenderer.h
@@ -60,7 +60,6 @@ public:
     static void updateTextureLayer(Layer* layer, uint32_t width, uint32_t height,
             bool isOpaque, bool forceFilter, GLenum renderTarget, float* textureTransform);
     static void destroyLayer(Layer* layer);
-    ANDROID_API static void destroyLayerDeferred(Layer* layer);
     static bool copyLayer(RenderState& renderState, Layer* layer, SkBitmap* bitmap);
 
     static void flushLayer(RenderState& renderState, Layer* layer);
diff --git a/libs/hwui/OpenGLRenderer.cpp b/libs/hwui/OpenGLRenderer.cpp
index 19fc9a3..d570b0d 100755
--- a/libs/hwui/OpenGLRenderer.cpp
+++ b/libs/hwui/OpenGLRenderer.cpp
@@ -509,11 +509,8 @@ void OpenGLRenderer::updateLayers() {
 
         // Note: it is very important to update the layers in order
         for (int i = 0; i < count; i++) {
-            Layer* layer = mLayerUpdates.itemAt(i);
+            Layer* layer = mLayerUpdates.itemAt(i).get();
             updateLayer(layer, false);
-            if (CC_UNLIKELY(mCaches.drawDeferDisabled)) {
-                mCaches.resourceCache.decrementRefcount(layer);
-            }
         }
 
         if (CC_UNLIKELY(mCaches.drawDeferDisabled)) {
@@ -532,7 +529,7 @@ void OpenGLRenderer::flushLayers() {
 
         // Note: it is very important to update the layers in order
         for (int i = 0; i < count; i++) {
-            Layer* layer = mLayerUpdates.itemAt(i);
+            Layer* layer = mLayerUpdates.itemAt(i).get();
 
             sprintf(layerName, "Layer #%d", i);
             startMark(layerName);
@@ -542,8 +539,6 @@ void OpenGLRenderer::flushLayers() {
 
             ATRACE_END();
             endMark();
-
-            mCaches.resourceCache.decrementRefcount(layer);
         }
 
         mLayerUpdates.clear();
@@ -565,7 +560,6 @@ void OpenGLRenderer::pushLayerUpdate(Layer* layer) {
             }
         }
         mLayerUpdates.push_back(layer);
-        mCaches.resourceCache.incrementRefcount(layer);
     }
 }
 
@@ -574,25 +568,12 @@ void OpenGLRenderer::cancelLayerUpdate(Layer* layer) {
         for (int i = mLayerUpdates.size() - 1; i >= 0; i--) {
             if (mLayerUpdates.itemAt(i) == layer) {
                 mLayerUpdates.removeAt(i);
-                mCaches.resourceCache.decrementRefcount(layer);
                 break;
             }
         }
     }
 }
 
-void OpenGLRenderer::clearLayerUpdates() {
-    size_t count = mLayerUpdates.size();
-    if (count > 0) {
-        mCaches.resourceCache.lock();
-        for (size_t i = 0; i < count; i++) {
-            mCaches.resourceCache.decrementRefcountLocked(mLayerUpdates.itemAt(i));
-        }
-        mCaches.resourceCache.unlock();
-        mLayerUpdates.clear();
-    }
-}
-
 void OpenGLRenderer::flushLayerUpdates() {
     ATRACE_CALL();
     syncState();
@@ -956,7 +937,7 @@ void OpenGLRenderer::composeLayer(const Snapshot& removed, const Snapshot& resto
     layer->setConvexMask(NULL);
     if (!mCaches.layerCache.put(layer)) {
         LAYER_LOGD("Deleting layer");
-        Caches::getInstance().resourceCache.decrementRefcount(layer);
+        layer->decStrong(0);
     }
 }
 
diff --git a/libs/hwui/OpenGLRenderer.h b/libs/hwui/OpenGLRenderer.h
index c2c0b0e..e1c3d10 100755
--- a/libs/hwui/OpenGLRenderer.h
+++ b/libs/hwui/OpenGLRenderer.h
@@ -140,7 +140,6 @@ public:
 
     void pushLayerUpdate(Layer* layer);
     void cancelLayerUpdate(Layer* layer);
-    void clearLayerUpdates();
     void flushLayerUpdates();
     void markLayersAsBuildLayers();
 
@@ -982,7 +981,7 @@ private:
     // List of rectangles to clear after saveLayer() is invoked
     Vector<Rect*> mLayers;
     // List of layers to update at the beginning of a frame
-    Vector<Layer*> mLayerUpdates;
+    Vector< sp<Layer> > mLayerUpdates;
 
     // The following fields are used to setup drawing
     // Used to describe the shaders to generate
diff --git a/libs/hwui/RenderNode.cpp b/libs/hwui/RenderNode.cpp
index 40cd13e..c9ed9a7 100644
--- a/libs/hwui/RenderNode.cpp
+++ b/libs/hwui/RenderNode.cpp
@@ -87,7 +87,11 @@ RenderNode::RenderNode()
 RenderNode::~RenderNode() {
     deleteDisplayListData();
     delete mStagingDisplayListData;
-    LayerRenderer::destroyLayerDeferred(mLayer);
+    if (mLayer) {
+        ALOGW("Memory Warning: Layer %p missed its detachment, held on to for far too long!", mLayer);
+        mLayer->postDecStrong();
+        mLayer = 0;
+    }
 }
 
 void RenderNode::setStagingDisplayList(DisplayListData* data) {
@@ -201,6 +205,7 @@ void RenderNode::pushLayerUpdate(TreeInfo& info) {
     info.damageAccumulator->peekAtDirty(&dirty);
 
     if (!mLayer) {
+        Caches::getInstance().dumpMemoryUsage();
         if (info.errorHandler) {
             std::string msg = "Unable to create layer for ";
             msg += getName();
diff --git a/libs/hwui/RenderNode.h b/libs/hwui/RenderNode.h
index f329283..2ce7cb7 100644
--- a/libs/hwui/RenderNode.h
+++ b/libs/hwui/RenderNode.h
@@ -101,7 +101,7 @@ public:
         kReplayFlag_ClipChildren = 0x1
     };
 
-    ANDROID_API static void outputLogBuffer(int fd);
+    static void outputLogBuffer(int fd);
     void debugDumpLayers(const char* prefix);
 
     ANDROID_API void setStagingDisplayList(DisplayListData* newData);
diff --git a/libs/hwui/RenderState.cpp b/libs/hwui/RenderState.cpp
index 86bd7dd..a8cf26f 100644
--- a/libs/hwui/RenderState.cpp
+++ b/libs/hwui/RenderState.cpp
@@ -16,15 +16,18 @@
 #include "RenderState.h"
 
 #include "renderthread/CanvasContext.h"
+#include "renderthread/EglManager.h"
 
 namespace android {
 namespace uirenderer {
 
-RenderState::RenderState()
-        : mCaches(NULL)
+RenderState::RenderState(renderthread::RenderThread& thread)
+        : mRenderThread(thread)
+        , mCaches(NULL)
         , mViewportWidth(0)
         , mViewportHeight(0)
         , mFramebuffer(0) {
+    mThreadId = pthread_self();
 }
 
 RenderState::~RenderState() {
@@ -39,7 +42,6 @@ void RenderState::onGLContextCreated() {
 
 void RenderState::onGLContextDestroyed() {
 /*
-    AutoMutex _lock(mLayerLock);
     size_t size = mActiveLayers.size();
     if (CC_UNLIKELY(size != 0)) {
         ALOGE("Crashing, have %d contexts and %d layers at context destruction. isempty %d",
@@ -146,5 +148,34 @@ void RenderState::debugOverdraw(bool enable, bool clear) {
     }
 }
 
+void RenderState::requireGLContext() {
+    assertOnGLThread();
+    mRenderThread.eglManager().requireGlContext();
+}
+
+void RenderState::assertOnGLThread() {
+    pthread_t curr = pthread_self();
+    LOG_ALWAYS_FATAL_IF(!pthread_equal(mThreadId, curr), "Wrong thread!");
+}
+
+
+class DecStrongTask : public renderthread::RenderTask {
+public:
+    DecStrongTask(VirtualLightRefBase* object) : mObject(object) {}
+
+    virtual void run() {
+        mObject->decStrong(0);
+        mObject = 0;
+        delete this;
+    }
+
+private:
+    VirtualLightRefBase* mObject;
+};
+
+void RenderState::postDecStrong(VirtualLightRefBase* object) {
+    mRenderThread.queue(new DecStrongTask(object));
+}
+
 } /* namespace uirenderer */
 } /* namespace android */
diff --git a/libs/hwui/RenderState.h b/libs/hwui/RenderState.h
index cbe7cfc..afeef95 100644
--- a/libs/hwui/RenderState.h
+++ b/libs/hwui/RenderState.h
@@ -53,16 +53,10 @@ public:
     void debugOverdraw(bool enable, bool clear);
 
     void registerLayer(const Layer* layer) {
-        /*
-        AutoMutex _lock(mLayerLock);
         mActiveLayers.insert(layer);
-        */
     }
     void unregisterLayer(const Layer* layer) {
-        /*
-        AutoMutex _lock(mLayerLock);
         mActiveLayers.erase(layer);
-        */
     }
 
     void registerCanvasContext(renderthread::CanvasContext* context) {
@@ -73,16 +67,24 @@ public:
         mRegisteredContexts.erase(context);
     }
 
+    void requireGLContext();
+
+    // TODO: This system is a little clunky feeling, this could use some
+    // more thinking...
+    void postDecStrong(VirtualLightRefBase* object);
+
 private:
     friend class renderthread::RenderThread;
     friend class Caches;
 
     void interruptForFunctorInvoke();
     void resumeFromFunctorInvoke();
+    void assertOnGLThread();
 
-    RenderState();
+    RenderState(renderthread::RenderThread& thread);
     ~RenderState();
 
+    renderthread::RenderThread& mRenderThread;
     Caches* mCaches;
     std::set<const Layer*> mActiveLayers;
     std::set<renderthread::CanvasContext*> mRegisteredContexts;
@@ -90,7 +92,8 @@ private:
     GLsizei mViewportWidth;
     GLsizei mViewportHeight;
     GLuint mFramebuffer;
-    Mutex mLayerLock;
+
+    pthread_t mThreadId;
 };
 
 } /* namespace uirenderer */
diff --git a/libs/hwui/ResourceCache.cpp b/libs/hwui/ResourceCache.cpp
index 8b553d1..329d92f 100644
--- a/libs/hwui/ResourceCache.cpp
+++ b/libs/hwui/ResourceCache.cpp
@@ -75,10 +75,6 @@ void ResourceCache::incrementRefcount(const Res_png_9patch* patchResource) {
     incrementRefcount((void*) patchResource, kNinePatch);
 }
 
-void ResourceCache::incrementRefcount(Layer* layerResource) {
-    incrementRefcount((void*) layerResource, kLayer);
-}
-
 void ResourceCache::incrementRefcountLocked(void* resource, ResourceType resourceType) {
     ssize_t index = mCache->indexOfKey(resource);
     ResourceReference* ref = index >= 0 ? mCache->valueAt(index) : NULL;
@@ -103,10 +99,6 @@ void ResourceCache::incrementRefcountLocked(const Res_png_9patch* patchResource)
     incrementRefcountLocked((void*) patchResource, kNinePatch);
 }
 
-void ResourceCache::incrementRefcountLocked(Layer* layerResource) {
-    incrementRefcountLocked((void*) layerResource, kLayer);
-}
-
 void ResourceCache::decrementRefcount(void* resource) {
     Mutex::Autolock _l(mLock);
     decrementRefcountLocked(resource);
@@ -126,10 +118,6 @@ void ResourceCache::decrementRefcount(const Res_png_9patch* patchResource) {
     decrementRefcount((void*) patchResource);
 }
 
-void ResourceCache::decrementRefcount(Layer* layerResource) {
-    decrementRefcount((void*) layerResource);
-}
-
 void ResourceCache::decrementRefcountLocked(void* resource) {
     ssize_t index = mCache->indexOfKey(resource);
     ResourceReference* ref = index >= 0 ? mCache->valueAt(index) : NULL;
@@ -157,10 +145,6 @@ void ResourceCache::decrementRefcountLocked(const Res_png_9patch* patchResource)
     decrementRefcountLocked((void*) patchResource);
 }
 
-void ResourceCache::decrementRefcountLocked(Layer* layerResource) {
-    decrementRefcountLocked((void*) layerResource);
-}
-
 void ResourceCache::destructor(SkPath* resource) {
     Mutex::Autolock _l(mLock);
     destructorLocked(resource);
@@ -274,7 +258,7 @@ void ResourceCache::deleteResourceReferenceLocked(const void* resource, Resource
     if (ref->recycled && ref->resourceType == kBitmap) {
         ((SkBitmap*) resource)->setPixels(NULL, NULL);
     }
-    if (ref->destroyed || ref->resourceType == kLayer) {
+    if (ref->destroyed) {
         switch (ref->resourceType) {
             case kBitmap: {
                 SkBitmap* bitmap = (SkBitmap*) resource;
@@ -305,11 +289,6 @@ void ResourceCache::deleteResourceReferenceLocked(const void* resource, Resource
                 }
             }
             break;
-            case kLayer: {
-                Layer* layer = (Layer*) resource;
-                Caches::getInstance().deleteLayerDeferred(layer);
-            }
-            break;
         }
     }
     mCache->removeItem(resource);
diff --git a/libs/hwui/ResourceCache.h b/libs/hwui/ResourceCache.h
index 3864d4b..8539d12 100644
--- a/libs/hwui/ResourceCache.h
+++ b/libs/hwui/ResourceCache.h
@@ -36,8 +36,7 @@ namespace uirenderer {
 enum ResourceType {
     kBitmap,
     kNinePatch,
-    kPath,
-    kLayer
+    kPath
 };
 
 class ResourceReference {
@@ -69,22 +68,18 @@ public:
     void incrementRefcount(const SkPath* resource);
     void incrementRefcount(const SkBitmap* resource);
     void incrementRefcount(const Res_png_9patch* resource);
-    void incrementRefcount(Layer* resource);
 
     void incrementRefcountLocked(const SkPath* resource);
     void incrementRefcountLocked(const SkBitmap* resource);
     void incrementRefcountLocked(const Res_png_9patch* resource);
-    void incrementRefcountLocked(Layer* resource);
 
     void decrementRefcount(const SkBitmap* resource);
     void decrementRefcount(const SkPath* resource);
     void decrementRefcount(const Res_png_9patch* resource);
-    void decrementRefcount(Layer* resource);
 
     void decrementRefcountLocked(const SkBitmap* resource);
     void decrementRefcountLocked(const SkPath* resource);
     void decrementRefcountLocked(const Res_png_9patch* resource);
-    void decrementRefcountLocked(Layer* resource);
 
     void destructor(SkPath* resource);
     void destructor(const SkBitmap* resource);
diff --git a/libs/hwui/renderthread/CanvasContext.cpp b/libs/hwui/renderthread/CanvasContext.cpp
index 9d2ae8b..b499dd0 100644
--- a/libs/hwui/renderthread/CanvasContext.cpp
+++ b/libs/hwui/renderthread/CanvasContext.cpp
@@ -236,6 +236,8 @@ void CanvasContext::draw() {
 
     if (status & DrawGlInfo::kStatusDrew) {
         swapBuffers();
+    } else {
+        mEglManager.cancelFrame();
     }
 
     profiler().finishFrame();
diff --git a/libs/hwui/renderthread/EglManager.cpp b/libs/hwui/renderthread/EglManager.cpp
index e37aafc..9bd6f41 100644
--- a/libs/hwui/renderthread/EglManager.cpp
+++ b/libs/hwui/renderthread/EglManager.cpp
@@ -73,7 +73,8 @@ EglManager::EglManager(RenderThread& thread)
         , mAllowPreserveBuffer(load_dirty_regions_property())
         , mCurrentSurface(EGL_NO_SURFACE)
         , mAtlasMap(NULL)
-        , mAtlasMapSize(0) {
+        , mAtlasMapSize(0)
+        , mInFrame(false) {
     mCanSetPreserveBuffer = mAllowPreserveBuffer;
     ALOGD("Use EGL_SWAP_BEHAVIOR_PRESERVED: %s", mAllowPreserveBuffer ? "true" : "false");
 }
@@ -105,10 +106,12 @@ bool EglManager::hasEglContext() {
 void EglManager::requireGlContext() {
     LOG_ALWAYS_FATAL_IF(mEglDisplay == EGL_NO_DISPLAY, "No EGL context");
 
-    // We can't be certain about the state of the current surface (whether
-    // or not it is destroyed, for example), so err on the side of using
-    // the pbuffer surface which we fully control
-    usePBufferSurface();
+    if (!mInFrame) {
+        // We can't be certain about the state of the current surface (whether
+        // or not it is destroyed, for example), so err on the side of using
+        // the pbuffer surface which we fully control
+        usePBufferSurface();
+    }
 }
 
 void EglManager::loadConfig() {
@@ -251,9 +254,11 @@ void EglManager::beginFrame(EGLSurface surface, EGLint* width, EGLint* height) {
         eglQuerySurface(mEglDisplay, surface, EGL_HEIGHT, height);
     }
     eglBeginFrame(mEglDisplay, surface);
+    mInFrame = true;
 }
 
 bool EglManager::swapBuffers(EGLSurface surface) {
+    mInFrame = false;
     eglSwapBuffers(mEglDisplay, surface);
     EGLint err = eglGetError();
     if (CC_LIKELY(err == EGL_SUCCESS)) {
@@ -272,6 +277,10 @@ bool EglManager::swapBuffers(EGLSurface surface) {
     return false;
 }
 
+void EglManager::cancelFrame() {
+    mInFrame = false;
+}
+
 bool EglManager::setPreserveBuffer(EGLSurface surface, bool preserve) {
     if (CC_UNLIKELY(!mAllowPreserveBuffer)) return false;
 
diff --git a/libs/hwui/renderthread/EglManager.h b/libs/hwui/renderthread/EglManager.h
index ae03ea1..e12db3a 100644
--- a/libs/hwui/renderthread/EglManager.h
+++ b/libs/hwui/renderthread/EglManager.h
@@ -48,6 +48,7 @@ public:
     bool makeCurrent(EGLSurface surface);
     void beginFrame(EGLSurface surface, EGLint* width, EGLint* height);
     bool swapBuffers(EGLSurface surface);
+    void cancelFrame();
 
     // Returns true iff the surface is now preserving buffers.
     bool setPreserveBuffer(EGLSurface surface, bool preserve);
@@ -80,6 +81,12 @@ private:
     sp<GraphicBuffer> mAtlasBuffer;
     int64_t* mAtlasMap;
     size_t mAtlasMapSize;
+
+    // Whether or not we are in the middle of drawing a frame. This is used
+    // to avoid switching surfaces mid-frame if requireGlContext() is called
+    // TODO: Need to be better about surface/context management so that this isn't
+    // necessary
+    bool mInFrame;
 };
 
 } /* namespace renderthread */
diff --git a/libs/hwui/renderthread/RenderProxy.cpp b/libs/hwui/renderthread/RenderProxy.cpp
index 8f99b4e..5d55ea6 100644
--- a/libs/hwui/renderthread/RenderProxy.cpp
+++ b/libs/hwui/renderthread/RenderProxy.cpp
@@ -235,12 +235,7 @@ void RenderProxy::invokeFunctor(Functor* functor, bool waitForCompletion) {
         // waitForCompletion = true is expected to be fairly rare and only
         // happen in destruction. Thus it should be fine to temporarily
         // create a Mutex
-        Mutex mutex;
-        Condition condition;
-        SignalingRenderTask syncTask(task, &mutex, &condition);
-        AutoMutex _lock(mutex);
-        thread.queue(&syncTask);
-        condition.wait(mutex);
+        staticPostAndWait(task);
     } else {
         thread.queue(task);
     }
@@ -258,17 +253,6 @@ void RenderProxy::runWithGlContext(RenderTask* gltask) {
     postAndWait(task);
 }
 
-CREATE_BRIDGE1(destroyLayer, Layer* layer) {
-    LayerRenderer::destroyLayer(args->layer);
-    return NULL;
-}
-
-void RenderProxy::enqueueDestroyLayer(Layer* layer) {
-    SETUP_TASK(destroyLayer);
-    args->layer = layer;
-    RenderThread::getInstance().queue(task);
-}
-
 CREATE_BRIDGE2(createTextureLayer, RenderThread* thread, CanvasContext* context) {
     Layer* layer = args->context->createTextureLayer();
     if (!layer) return 0;
@@ -400,6 +384,17 @@ void RenderProxy::dumpProfileInfo(int fd) {
     postAndWait(task);
 }
 
+CREATE_BRIDGE1(outputLogBuffer, int fd) {
+    RenderNode::outputLogBuffer(args->fd);
+    return NULL;
+}
+
+void RenderProxy::outputLogBuffer(int fd) {
+    SETUP_TASK(outputLogBuffer);
+    args->fd = fd;
+    staticPostAndWait(task);
+}
+
 CREATE_BRIDGE4(setTextureAtlas, RenderThread* thread, GraphicBuffer* buffer, int64_t* map, size_t size) {
     CanvasContext::setTextureAtlas(*args->thread, args->buffer, args->map, args->size);
     args->buffer->decStrong(0);
@@ -430,6 +425,19 @@ void* RenderProxy::postAndWait(MethodInvokeRenderTask* task) {
     return retval;
 }
 
+void* RenderProxy::staticPostAndWait(MethodInvokeRenderTask* task) {
+    RenderThread& thread = RenderThread::getInstance();
+    void* retval;
+    task->setReturnPtr(&retval);
+    Mutex mutex;
+    Condition condition;
+    SignalingRenderTask syncTask(task, &mutex, &condition);
+    AutoMutex _lock(mutex);
+    thread.queue(&syncTask);
+    condition.wait(mutex);
+    return retval;
+}
+
 } /* namespace renderthread */
 } /* namespace uirenderer */
 } /* namespace android */
diff --git a/libs/hwui/renderthread/RenderProxy.h b/libs/hwui/renderthread/RenderProxy.h
index dddf0c7..4989b14 100644
--- a/libs/hwui/renderthread/RenderProxy.h
+++ b/libs/hwui/renderthread/RenderProxy.h
@@ -81,7 +81,6 @@ public:
 
     ANDROID_API void runWithGlContext(RenderTask* task);
 
-    static void enqueueDestroyLayer(Layer* layer);
     ANDROID_API DeferredLayerUpdater* createTextureLayer();
     ANDROID_API void buildLayer(RenderNode* node);
     ANDROID_API bool copyLayerInto(DeferredLayerUpdater* layer, SkBitmap* bitmap);
@@ -97,6 +96,7 @@ public:
     ANDROID_API void notifyFramePending();
 
     ANDROID_API void dumpProfileInfo(int fd);
+    ANDROID_API static void outputLogBuffer(int fd);
 
     ANDROID_API void setTextureAtlas(const sp<GraphicBuffer>& buffer, int64_t* map, size_t size);
 
@@ -114,6 +114,8 @@ private:
     void post(RenderTask* task);
     void* postAndWait(MethodInvokeRenderTask* task);
 
+    static void* staticPostAndWait(MethodInvokeRenderTask* task);
+
     // Friend class to help with bridging
     friend class RenderProxyBridge;
 };
diff --git a/libs/hwui/renderthread/RenderThread.cpp b/libs/hwui/renderthread/RenderThread.cpp
index 403e164..f887103 100644
--- a/libs/hwui/renderthread/RenderThread.cpp
+++ b/libs/hwui/renderthread/RenderThread.cpp
@@ -168,7 +168,7 @@ void RenderThread::initializeDisplayEventReceiver() {
 void RenderThread::initThreadLocals() {
     initializeDisplayEventReceiver();
     mEglManager = new EglManager(*this);
-    mRenderState = new RenderState();
+    mRenderState = new RenderState(*this);
 }
 
 int RenderThread::displayEventReceiverCallback(int fd, int events, void* data) {