diff --git a/core/java/android/view/ThreadedRenderer.java b/core/java/android/view/ThreadedRenderer.java
index 5017a38..25c5127 100644
--- a/core/java/android/view/ThreadedRenderer.java
+++ b/core/java/android/view/ThreadedRenderer.java
@@ -460,8 +460,6 @@
                     if (buffer != null) {
                         long[] map = atlas.getMap();
                         if (map != null) {
-                            // TODO Remove after fixing b/15425820
-                            validateMap(context, map);
                             nSetAtlas(renderProxy, buffer, map);
                         }
                         // If IAssetAtlas is not the same class as the IBinder
@@ -476,32 +474,6 @@
                 Log.w(LOG_TAG, "Could not acquire atlas", e);
             }
         }
-
-        private static void validateMap(Context context, long[] map) {
-            Log.d("Atlas", "Validating map...");
-            HashSet<Long> preloadedPointers = new HashSet<Long>();
-
-            // We only care about drawables that hold bitmaps
-            final Resources resources = context.getResources();
-            final LongSparseArray<Drawable.ConstantState> drawables = resources.getPreloadedDrawables();
-
-            final int count = drawables.size();
-            ArrayList<Bitmap> tmpList = new ArrayList<Bitmap>();
-            for (int i = 0; i < count; i++) {
-                drawables.valueAt(i).addAtlasableBitmaps(tmpList);
-                for (int j = 0; j < tmpList.size(); j++) {
-                    preloadedPointers.add(tmpList.get(j).getSkBitmap());
-                }
-                tmpList.clear();
-            }
-
-            for (int i = 0; i < map.length; i += 4) {
-                if (!preloadedPointers.contains(map[i])) {
-                    Log.w("Atlas", String.format("Pointer 0x%X, not in getPreloadedDrawables?", map[i]));
-                    map[i] = 0;
-                }
-            }
-        }
     }
 
     static native void setupShadersDiskCache(String cacheFile);
diff --git a/core/jni/android/graphics/Bitmap.cpp b/core/jni/android/graphics/Bitmap.cpp
index 7a934bd..5c95f8a 100755
--- a/core/jni/android/graphics/Bitmap.cpp
+++ b/core/jni/android/graphics/Bitmap.cpp
@@ -857,6 +857,13 @@
     bitmap->unlockPixels();
 }
 
+static jlong Bitmap_refPixelRef(JNIEnv* env, jobject, jlong bitmapHandle) {
+    SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(bitmapHandle);
+    SkPixelRef* pixelRef = bitmap ? bitmap->pixelRef() : nullptr;
+    SkSafeRef(pixelRef);
+    return reinterpret_cast<jlong>(pixelRef);
+}
+
 ///////////////////////////////////////////////////////////////////////////////
 
 static JNINativeMethod gBitmapMethods[] = {
@@ -896,6 +903,7 @@
                                             (void*)Bitmap_copyPixelsFromBuffer },
     {   "nativeSameAs",             "(JJ)Z", (void*)Bitmap_sameAs },
     {   "nativePrepareToDraw",      "(J)V", (void*)Bitmap_prepareToDraw },
+    {   "nativeRefPixelRef",        "(J)J", (void*)Bitmap_refPixelRef },
 };
 
 int register_android_graphics_Bitmap(JNIEnv* env)
diff --git a/graphics/java/android/graphics/Bitmap.java b/graphics/java/android/graphics/Bitmap.java
index e2f7799..76d6edf 100644
--- a/graphics/java/android/graphics/Bitmap.java
+++ b/graphics/java/android/graphics/Bitmap.java
@@ -1573,6 +1573,15 @@
         return mSkBitmapPtr;
     }
 
+    /**
+     * Refs the underlying SkPixelRef and returns a pointer to it.
+     *
+     * @hide
+     * */
+    public final long refSkPixelRef() {
+        return nativeRefPixelRef(mSkBitmapPtr);
+    }
+
     private static class BitmapFinalizer {
         private long mNativeBitmap;
 
@@ -1661,4 +1670,5 @@
     private static native boolean nativeHasMipMap(long nativeBitmap);
     private static native void nativeSetHasMipMap(long nativeBitmap, boolean hasMipMap);
     private static native boolean nativeSameAs(long nativeBitmap0, long nativeBitmap1);
+    private static native long nativeRefPixelRef(long nativeBitmap);
 }
diff --git a/libs/hwui/AssetAtlas.cpp b/libs/hwui/AssetAtlas.cpp
index 4d2e3a0..882826e 100644
--- a/libs/hwui/AssetAtlas.cpp
+++ b/libs/hwui/AssetAtlas.cpp
@@ -82,12 +82,12 @@
 ///////////////////////////////////////////////////////////////////////////////
 
 AssetAtlas::Entry* AssetAtlas::getEntry(const SkBitmap* bitmap) const {
-    ssize_t index = mEntries.indexOfKey(bitmap);
+    ssize_t index = mEntries.indexOfKey(bitmap->pixelRef());
     return index >= 0 ? mEntries.valueAt(index) : nullptr;
 }
 
 Texture* AssetAtlas::getEntryTexture(const SkBitmap* bitmap) const {
-    ssize_t index = mEntries.indexOfKey(bitmap);
+    ssize_t index = mEntries.indexOfKey(bitmap->pixelRef());
     return index >= 0 ? mEntries.valueAt(index)->texture : nullptr;
 }
 
@@ -120,7 +120,7 @@
     const float height = float(mTexture->height);
 
     for (int i = 0; i < count; ) {
-        SkBitmap* bitmap = reinterpret_cast<SkBitmap*>(map[i++]);
+        SkPixelRef* pixelRef = reinterpret_cast<SkPixelRef*>(map[i++]);
         // NOTE: We're converting from 64 bit signed values to 32 bit
         // signed values. This is guaranteed to be safe because the "x"
         // and "y" coordinate values are guaranteed to be representable
@@ -131,21 +131,21 @@
         bool rotated = map[i++] > 0;
 
         // Bitmaps should never be null, we're just extra paranoid
-        if (!bitmap) continue;
+        if (!pixelRef) continue;
 
         const UvMapper mapper(
-                x / width, (x + bitmap->width()) / width,
-                y / height, (y + bitmap->height()) / height);
+                x / width, (x + pixelRef->info().width()) / width,
+                y / height, (y + pixelRef->info().height()) / height);
 
         Texture* texture = new DelegateTexture(caches, mTexture);
-        texture->blend = !bitmap->isOpaque();
-        texture->width = bitmap->width();
-        texture->height = bitmap->height();
+        texture->blend = !SkAlphaTypeIsOpaque(pixelRef->info().alphaType());
+        texture->width = pixelRef->info().width();
+        texture->height = pixelRef->info().height();
 
-        Entry* entry = new Entry(bitmap, x, y, rotated, texture, mapper, *this);
+        Entry* entry = new Entry(pixelRef, x, y, rotated, texture, mapper, *this);
         texture->uvMapper = &entry->uvMapper;
 
-        mEntries.add(entry->bitmap, entry);
+        mEntries.add(entry->pixelRef, entry);
     }
 }
 
diff --git a/libs/hwui/AssetAtlas.h b/libs/hwui/AssetAtlas.h
index 1772eff..17c5281 100644
--- a/libs/hwui/AssetAtlas.h
+++ b/libs/hwui/AssetAtlas.h
@@ -48,24 +48,8 @@
      * Entry representing the position and rotation of a
      * bitmap inside the atlas.
      */
-    struct Entry {
-        /**
-         * The bitmap that generated this atlas entry.
-         */
-        SkBitmap* bitmap;
-
-        /**
-         * Location of the bitmap inside the atlas, in pixels.
-         */
-        int x;
-        int y;
-
-        /**
-         * If set, the bitmap is rotated 90 degrees (clockwise)
-         * inside the atlas.
-         */
-        bool rotated;
-
+    class Entry {
+    public:
         /*
          * A "virtual texture" object that represents the texture
          * this entry belongs to. This texture should never be
@@ -80,11 +64,6 @@
         const UvMapper uvMapper;
 
         /**
-         * Atlas this entry belongs to.
-         */
-        const AssetAtlas& atlas;
-
-        /**
          * Unique identifier used to merge bitmaps and 9-patches stored
          * in the atlas.
          */
@@ -93,10 +72,37 @@
         }
 
     private:
-        Entry(SkBitmap* bitmap, int x, int y, bool rotated,
-                Texture* texture, const UvMapper& mapper, const AssetAtlas& atlas):
-                bitmap(bitmap), x(x), y(y), rotated(rotated),
-                texture(texture), uvMapper(mapper), atlas(atlas) {
+        /**
+         * The pixel ref that generated this atlas entry.
+         */
+        SkPixelRef* pixelRef;
+
+        /**
+         * Location of the bitmap inside the atlas, in pixels.
+         */
+        int x;
+        int y;
+
+        /**
+         * If set, the bitmap is rotated 90 degrees (clockwise)
+         * inside the atlas.
+         */
+        bool rotated;
+
+        /**
+         * Atlas this entry belongs to.
+         */
+        const AssetAtlas& atlas;
+
+        Entry(SkPixelRef* pixelRef, int x, int y, bool rotated,
+                    Texture* texture, const UvMapper& mapper, const AssetAtlas& atlas)
+                : texture(texture)
+                , uvMapper(mapper)
+                , pixelRef(pixelRef)
+                , x(x)
+                , y(y)
+                , rotated(rotated)
+                , atlas(atlas) {
         }
 
         ~Entry() {
@@ -178,7 +184,7 @@
     const bool mBlendKey;
     const bool mOpaqueKey;
 
-    KeyedVector<const SkBitmap*, Entry*> mEntries;
+    KeyedVector<const SkPixelRef*, Entry*> mEntries;
 }; // class AssetAtlas
 
 }; // namespace uirenderer
diff --git a/services/core/java/com/android/server/AssetAtlasService.java b/services/core/java/com/android/server/AssetAtlasService.java
index 9e28b64..26f4232 100644
--- a/services/core/java/com/android/server/AssetAtlasService.java
+++ b/services/core/java/com/android/server/AssetAtlasService.java
@@ -199,8 +199,6 @@
         private final ArrayList<Bitmap> mBitmaps;
         private final int mPixelCount;
 
-        private Bitmap mAtlasBitmap;
-
         Renderer(ArrayList<Bitmap> bitmaps, int pixelCount) {
             mBitmaps = bitmaps;
             mPixelCount = pixelCount;
@@ -255,8 +253,9 @@
 
             // We always render the atlas into a bitmap. This bitmap is then
             // uploaded into the GraphicBuffer using OpenGL to swizzle the content
-            final Canvas canvas = acquireCanvas(buffer.getWidth(), buffer.getHeight());
-            if (canvas == null) return false;
+            final Bitmap atlasBitmap = Bitmap.createBitmap(
+                    buffer.getWidth(), buffer.getHeight(), Bitmap.Config.ARGB_8888);
+            final Canvas canvas = new Canvas(atlasBitmap);
 
             final Atlas.Entry entry = new Atlas.Entry();
 
@@ -265,73 +264,58 @@
             int mapIndex = 0;
 
             boolean result = false;
-            try {
-                final long startRender = System.nanoTime();
-                final int count = mBitmaps.size();
+            final long startRender = System.nanoTime();
+            final int count = mBitmaps.size();
 
-                for (int i = 0; i < count; i++) {
-                    final Bitmap bitmap = mBitmaps.get(i);
-                    if (atlas.pack(bitmap.getWidth(), bitmap.getHeight(), entry) != null) {
-                        // We have more bitmaps to pack than the current configuration
-                        // says, we were most likely not able to detect a change in the
-                        // list of preloaded drawables, abort and delete the configuration
-                        if (mapIndex >= mAtlasMap.length) {
-                            deleteDataFile();
-                            break;
-                        }
-
-                        canvas.save();
-                        canvas.translate(entry.x, entry.y);
-                        if (entry.rotated) {
-                            canvas.translate(bitmap.getHeight(), 0.0f);
-                            canvas.rotate(90.0f);
-                        }
-                        canvas.drawBitmap(bitmap, 0.0f, 0.0f, null);
-                        canvas.restore();
-                        atlasMap[mapIndex++] = bitmap.getSkBitmap();
-                        atlasMap[mapIndex++] = entry.x;
-                        atlasMap[mapIndex++] = entry.y;
-                        atlasMap[mapIndex++] = entry.rotated ? 1 : 0;
+            for (int i = 0; i < count; i++) {
+                final Bitmap bitmap = mBitmaps.get(i);
+                if (atlas.pack(bitmap.getWidth(), bitmap.getHeight(), entry) != null) {
+                    // We have more bitmaps to pack than the current configuration
+                    // says, we were most likely not able to detect a change in the
+                    // list of preloaded drawables, abort and delete the configuration
+                    if (mapIndex >= mAtlasMap.length) {
+                        deleteDataFile();
+                        break;
                     }
+
+                    canvas.save();
+                    canvas.translate(entry.x, entry.y);
+                    if (entry.rotated) {
+                        canvas.translate(bitmap.getHeight(), 0.0f);
+                        canvas.rotate(90.0f);
+                    }
+                    canvas.drawBitmap(bitmap, 0.0f, 0.0f, null);
+                    canvas.restore();
+                    atlasMap[mapIndex++] = bitmap.refSkPixelRef();
+                    atlasMap[mapIndex++] = entry.x;
+                    atlasMap[mapIndex++] = entry.y;
+                    atlasMap[mapIndex++] = entry.rotated ? 1 : 0;
                 }
+            }
 
-                final long endRender = System.nanoTime();
-                result = nUploadAtlas(buffer, mAtlasBitmap);
+            final long endRender = System.nanoTime();
+            releaseCanvas(canvas, atlasBitmap);
+            result = nUploadAtlas(buffer, atlasBitmap);
+            atlasBitmap.recycle();
+            final long endUpload = System.nanoTime();
 
-                final long endUpload = System.nanoTime();
-                if (DEBUG_ATLAS) {
-                    float renderDuration = (endRender - startRender) / 1000.0f / 1000.0f;
-                    float uploadDuration = (endUpload - endRender) / 1000.0f / 1000.0f;
-                    Log.d(LOG_TAG, String.format("Rendered atlas in %.2fms (%.2f+%.2fms)",
-                            renderDuration + uploadDuration, renderDuration, uploadDuration));
-                }
-
-            } finally {
-                releaseCanvas(canvas);
+            if (DEBUG_ATLAS) {
+                float renderDuration = (endRender - startRender) / 1000.0f / 1000.0f;
+                float uploadDuration = (endUpload - endRender) / 1000.0f / 1000.0f;
+                Log.d(LOG_TAG, String.format("Rendered atlas in %.2fms (%.2f+%.2fms)",
+                        renderDuration + uploadDuration, renderDuration, uploadDuration));
             }
 
             return result;
         }
 
         /**
-         * Returns a Canvas for the specified buffer. If {@link #DEBUG_ATLAS_TEXTURE}
-         * is turned on, the returned Canvas will render into a local bitmap that
-         * will then be saved out to disk for debugging purposes.
-         * @param width
-         * @param height
-         */
-        private Canvas acquireCanvas(int width, int height) {
-            mAtlasBitmap = Bitmap.createBitmap(width, height, Bitmap.Config.ARGB_8888);
-            return new Canvas(mAtlasBitmap);
-        }
-
-        /**
          * Releases the canvas used to render into the buffer. Calling this method
          * will release any resource previously acquired. If {@link #DEBUG_ATLAS_TEXTURE}
          * is turend on, calling this method will write the content of the atlas
          * to disk in /data/system/atlas.png for debugging.
          */
-        private void releaseCanvas(Canvas canvas) {
+        private void releaseCanvas(Canvas canvas, Bitmap atlasBitmap) {
             canvas.setBitmap(null);
             if (DEBUG_ATLAS_TEXTURE) {
 
@@ -340,7 +324,7 @@
 
                 try {
                     FileOutputStream out = new FileOutputStream(dataFile);
-                    mAtlasBitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
+                    atlasBitmap.compress(Bitmap.CompressFormat.PNG, 100, out);
                     out.close();
                 } catch (FileNotFoundException e) {
                     // Ignore
@@ -348,8 +332,6 @@
                     // Ignore
                 }
             }
-            mAtlasBitmap.recycle();
-            mAtlasBitmap = null;
         }
     }