diff --git a/services/surfaceflinger/Layer.cpp b/services/surfaceflinger/Layer.cpp
index 5018fb3..81cb15d 100644
--- a/services/surfaceflinger/Layer.cpp
+++ b/services/surfaceflinger/Layer.cpp
@@ -57,7 +57,7 @@
         mSecure(false),
         mTextureManager(),
         mBufferManager(mTextureManager),
-        mWidth(0), mHeight(0), mFixedSize(false)
+        mWidth(0), mHeight(0), mNeedsScaling(false), mFixedSize(false)
 {
 }
 
@@ -216,13 +216,10 @@
 
 void Layer::drawForSreenShot() const
 {
-    bool currentFixedSize = mFixedSize;
-    bool currentBlending = mNeedsBlending;
-    const_cast<Layer*>(this)->mFixedSize = false;
-    const_cast<Layer*>(this)->mFixedSize = true;
+    const bool currentFiltering = mNeedsFiltering;
+    const_cast<Layer*>(this)->mNeedsFiltering = true;
     LayerBase::drawForSreenShot();
-    const_cast<Layer*>(this)->mFixedSize = currentFixedSize;
-    const_cast<Layer*>(this)->mNeedsBlending = currentBlending;
+    const_cast<Layer*>(this)->mNeedsFiltering = currentFiltering;
 }
 
 void Layer::onDraw(const Region& clip) const
@@ -260,11 +257,10 @@
 bool Layer::needsFiltering() const
 {
     if (!(mFlags & DisplayHardware::SLOW_CONFIG)) {
-        // NOTE: there is a race here, because mFixedSize is updated in a
-        // binder transaction. however, it doesn't really matter since it is
-        // evaluated each time we draw. To be perfectly correct, this flag
-        // would have to be associated with a buffer.
-        if (mFixedSize)
+        // if our buffer is not the same size than ourselves,
+        // we need filtering.
+        Mutex::Autolock _l(mLock);
+        if (mNeedsScaling)
             return true;
     }
     return LayerBase::needsFiltering();
@@ -321,6 +317,7 @@
         Mutex::Autolock _l(mLock);
 
         // zero means default
+        mFixedSize = reqWidth && reqHeight;
         if (!reqFormat) reqFormat = mFormat;
         if (!reqWidth)  reqWidth = mWidth;
         if (!reqHeight) reqHeight = mHeight;
@@ -334,6 +331,7 @@
             mReqWidth  = reqWidth;
             mReqHeight = reqHeight;
             mReqFormat = reqFormat;
+            mNeedsScaling = mWidth != mReqWidth || mHeight != mReqHeight;
 
             lcblk->reallocateAllExcept(index);
         }
@@ -457,6 +455,7 @@
     Mutex::Autolock _l(mLock);
     mWidth = w;
     mHeight = h;
+    mNeedsScaling = mWidth != mReqWidth || mHeight != mReqHeight;
 }
 
 bool Layer::isFixedSize() const {