diff --git a/libs/surfaceflinger/LayerBase.cpp b/libs/surfaceflinger/LayerBase.cpp
index fdf6627..140f10c 100644
--- a/libs/surfaceflinger/LayerBase.cpp
+++ b/libs/surfaceflinger/LayerBase.cpp
@@ -54,7 +54,7 @@
       mOrientation(0),
       mLeft(0), mTop(0),
       mTransactionFlags(0),
-      mPremultipliedAlpha(true),
+      mPremultipliedAlpha(true), mDebug(false),
       mInvalidate(0)
 {
     const DisplayHardware& hw(flinger->graphicPlane(0).displayHardware());
@@ -65,6 +65,14 @@
 {
 }
 
+void LayerBase::setName(const String8& name) {
+    mName = name;
+}
+
+String8 LayerBase::getName() const {
+    return mName;
+}
+
 const GraphicPlane& LayerBase::graphicPlane(int dpy) const
 { 
     return mFlinger->graphicPlane(dpy);
@@ -698,8 +706,7 @@
 
 LayerBaseClient::LayerBaseClient(SurfaceFlinger* flinger, DisplayID display,
         const sp<Client>& client, int32_t i)
-    : LayerBase(flinger, display), lcblk(NULL), client(client),
-      mDebug(false), mIndex(i),
+    : LayerBase(flinger, display), lcblk(NULL), client(client), mIndex(i),
       mIdentity(uint32_t(android_atomic_inc(&sIdentity)))
 {
     lcblk = new SharedBufferServer(
@@ -724,14 +731,6 @@
     delete lcblk;
 }
 
-void LayerBaseClient::setName(const String8& name) {
-    mName = name;
-}
-
-String8 LayerBaseClient::getName() const {
-    return mName;
-}
-
 int32_t LayerBaseClient::serverIndex() const 
 {
     sp<Client> client(this->client.promote());
diff --git a/libs/surfaceflinger/LayerBase.h b/libs/surfaceflinger/LayerBase.h
index 852b9f9..a6e5644 100644
--- a/libs/surfaceflinger/LayerBase.h
+++ b/libs/surfaceflinger/LayerBase.h
@@ -101,6 +101,9 @@
                 Region          transparentRegion;
             };
 
+            void setName(const String8& name);
+            String8 getName() const;
+
             // modify current state
             bool setPosition(int32_t x, int32_t y);
             bool setLayer(uint32_t z);
@@ -121,7 +124,7 @@
             void drawRegion(const Region& reg) const;
 
             void invalidate();
-            
+
     /**
      * draw - performs some global clipping optimizations
      * and calls onDraw().
@@ -287,6 +290,9 @@
 
                 // don't change, don't need a lock
                 bool            mPremultipliedAlpha;
+                String8         mName;
+    mutable     bool            mDebug;
+
 
                 // atomic
     volatile    int32_t         mInvalidate;
@@ -320,8 +326,6 @@
             const sp<Client>& client, int32_t i);
     virtual ~LayerBaseClient();
     virtual void onFirstRef();
-    void setName(const String8& name);
-    String8 getName() const;
 
     const wp<Client>    client;
 
@@ -369,15 +373,11 @@
 
     friend class Surface;
 
-protected:
-    mutable     bool            mDebug;
-
 private:
                 int32_t         mIndex;
     mutable     Mutex           mLock;
     mutable     wp<Surface>     mClientSurface;
     // only read
-                String8         mName;
     const       uint32_t        mIdentity;
     static      int32_t         sIdentity;
 };
diff --git a/libs/surfaceflinger/Transform.cpp b/libs/surfaceflinger/Transform.cpp
index b2d5856..175f989 100644
--- a/libs/surfaceflinger/Transform.cpp
+++ b/libs/surfaceflinger/Transform.cpp
@@ -65,17 +65,14 @@
 Transform::~Transform() {
 }
 
-
-bool Transform::absIsOne(float f) {
-    return fabs(f) == 1.0f;
-}
+static const float EPSILON = 0.0f;
 
 bool Transform::isZero(float f) {
-    return fabs(f) == 0.0f;
+    return fabs(f) <= EPSILON;
 }
 
-bool Transform::absEqual(float a, float b) {
-    return fabs(a) == fabs(b);
+bool Transform::absIsOne(float f) {
+    return isZero(fabs(f) - 1.0f);
 }
 
 Transform Transform::operator * (const Transform& rhs) const
@@ -154,8 +151,14 @@
     mType = UNKNOWN_TYPE;
 }
 
-void Transform::set(uint32_t flags, float w, float h)
+status_t Transform::set(uint32_t flags, float w, float h)
 {
+    if (flags & ROT_INVALID) {
+        // that's not allowed!
+        reset();
+        return BAD_VALUE;
+    }
+
     mType = flags << 8;
     float sx = (flags & FLIP_H) ? -1 : 1;
     float sy = (flags & FLIP_V) ? -1 : 1;
@@ -205,6 +208,8 @@
     M[0][0] = a;    M[1][0] = b;    M[2][0] = x;
     M[0][1] = c;    M[1][1] = d;    M[2][1] = y;
     M[0][2] = 0;    M[1][2] = 0;    M[2][2] = 1;
+
+    return NO_ERROR;
 }
 
 Transform::vec2 Transform::transform(const vec2& v) const {
@@ -295,25 +300,17 @@
         bool scale = false;
         uint32_t flags = ROT_0;
         if (isZero(b) && isZero(c)) {
-            if (absEqual(a, d)) {
-                if (a<0)    flags |= FLIP_H;
-                if (d<0)    flags |= FLIP_V;
-                if (!absIsOne(a) || !absIsOne(d)) {
-                    scale = true;
-                }
-            } else {
-                flags = ROT_INVALID;
+            if (a<0)    flags |= FLIP_H;
+            if (d<0)    flags |= FLIP_V;
+            if (!absIsOne(a) || !absIsOne(d)) {
+                scale = true;
             }
         } else if (isZero(a) && isZero(d)) {
-            if (absEqual(b, c)) {
-                flags |= ROT_90;
-                if (b>0)    flags |= FLIP_H;
-                if (c<0)    flags |= FLIP_V;
-                if (!absIsOne(b) || !absIsOne(c)) {
-                    scale = true;
-                }
-            } else {
-                flags = ROT_INVALID;
+            flags |= ROT_90;
+            if (b>0)    flags |= FLIP_H;
+            if (c<0)    flags |= FLIP_V;
+            if (!absIsOne(b) || !absIsOne(c)) {
+                scale = true;
             }
         } else {
             flags = ROT_INVALID;
@@ -361,15 +358,22 @@
     const mat33& m(mMatrix);
     uint32_t orient = mType >> 8;
 
-    if (orient&ROT_INVALID)
+    if (orient&ROT_INVALID) {
         flags.append("ROT_INVALID ");
-    if (orient&ROT_90)
-        flags.append("ROT_90 ");
-    if (orient&FLIP_V)
-        flags.append("FLIP_V ");
-    if (orient&FLIP_H)
-        flags.append("FLIP_H ");
+    } else {
+        if (orient&ROT_90) {
+            flags.append("ROT_90 ");
+        } else {
+            flags.append("ROT_0 ");
+        }
+        if (orient&FLIP_V)
+            flags.append("FLIP_V ");
+        if (orient&FLIP_H)
+            flags.append("FLIP_H ");
+    }
 
+    if (!(mType&(SCALE|ROTATE|TRANSLATE)))
+        type.append("IDENTITY ");
     if (mType&SCALE)
         type.append("SCALE ");
     if (mType&ROTATE)
@@ -377,10 +381,10 @@
     if (mType&TRANSLATE)
         type.append("TRANSLATE ");
 
-    LOGD("%s (%s, %s)", name, flags.string(), type.string());
-    LOGD("%.2f  %.2f  %.2f", m[0][0], m[1][0], m[2][0]);
-    LOGD("%.2f  %.2f  %.2f", m[0][1], m[1][1], m[2][1]);
-    LOGD("%.2f  %.2f  %.2f", m[0][2], m[1][2], m[2][2]);
+    LOGD("%s 0x%08x (%s, %s)", name, mType, flags.string(), type.string());
+    LOGD("%.4f  %.4f  %.4f", m[0][0], m[1][0], m[2][0]);
+    LOGD("%.4f  %.4f  %.4f", m[0][1], m[1][1], m[2][1]);
+    LOGD("%.4f  %.4f  %.4f", m[0][2], m[1][2], m[2][2]);
 }
 
 // ---------------------------------------------------------------------------
diff --git a/libs/surfaceflinger/Transform.h b/libs/surfaceflinger/Transform.h
index 51d3e3f..2e5b893 100644
--- a/libs/surfaceflinger/Transform.h
+++ b/libs/surfaceflinger/Transform.h
@@ -69,10 +69,10 @@
             int     ty() const;
 
             // modify the transform
-            void    reset();
-            void    set(float tx, float ty);
-            void    set(float a, float b, float c, float d);
-            void    set(uint32_t flags, float w, float h);
+            void        reset();
+            void        set(float tx, float ty);
+            void        set(float a, float b, float c, float d);
+            status_t    set(uint32_t flags, float w, float h);
 
             // transform data
             Rect    makeBounds(int w, int h) const;
@@ -80,6 +80,9 @@
             Region  transform(const Region& reg) const;
             Transform operator * (const Transform& rhs) const;
 
+            // for debugging
+            void dump(const char* name) const;
+
 private:
     struct vec3 {
         float v[3];
@@ -113,11 +116,8 @@
     Rect transform(const Rect& bounds) const;
     uint32_t type() const;
     static bool absIsOne(float f);
-    static bool absEqual(float a, float b);
     static bool isZero(float f);
 
-    void dump(const char* name) const;
-
     mat33               mMatrix;
     mutable uint32_t    mType;
 };