diff --git a/libs/surfaceflinger/LayerBase.cpp b/libs/surfaceflinger/LayerBase.cpp
index cc9c586..4547a83 100644
--- a/libs/surfaceflinger/LayerBase.cpp
+++ b/libs/surfaceflinger/LayerBase.cpp
@@ -289,8 +289,9 @@
 
 void LayerBase::drawRegion(const Region& reg) const
 {
-    Region::iterator iterator(reg);
-    if (iterator) {
+    Region::const_iterator it = reg.begin();
+    Region::const_iterator const end = reg.end();
+    if (it != end) {
         Rect r;
         const DisplayHardware& hw(graphicPlane(0).displayHardware());
         const int32_t fbWidth  = hw.getWidth();
@@ -298,7 +299,8 @@
         const GLshort vertices[][2] = { { 0, 0 }, { fbWidth, 0 }, 
                 { fbWidth, fbHeight }, { 0, fbHeight }  };
         glVertexPointer(2, GL_SHORT, 0, vertices);
-        while (iterator.iterate(&r)) {
+        while (it != end) {
+            const Rect& r = *it++;
             const GLint sy = fbHeight - (r.top + r.height());
             glScissor(r.left, sy, r.width(), r.height());
             glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
@@ -363,12 +365,14 @@
     glDisable(GL_TEXTURE_2D);
     glDisable(GL_BLEND);
     glDisable(GL_DITHER);
-    Rect r;
-    Region::iterator iterator(clip);
-    if (iterator) {
+
+    Region::const_iterator it = clip.begin();
+    Region::const_iterator const end = clip.end();
+    if (it != end) {
         glEnable(GL_SCISSOR_TEST);
         glVertexPointer(2, GL_FIXED, 0, mVertices);
-        while (iterator.iterate(&r)) {
+        while (it != end) {
+            const Rect& r = *it++;
             const GLint sy = fbHeight - (r.top + r.height());
             glScissor(r.left, sy, r.width(), r.height());
             glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
@@ -434,8 +438,9 @@
             || !(mFlags & DisplayHardware::DRAW_TEXTURE_EXTENSION) )) 
     {
         //StopWatch watch("GL transformed");
-        Region::iterator iterator(clip);
-        if (iterator) {
+        Region::const_iterator it = clip.begin();
+        Region::const_iterator const end = clip.end();
+        if (it != end) {
             // always use high-quality filtering with fast configurations
             bool fast = !(mFlags & DisplayHardware::SLOW_CONFIG);
             if (!fast && s.flags & ISurfaceComposer::eLayerFilter) {
@@ -474,8 +479,8 @@
             glVertexPointer(2, GL_FIXED, 0, mVertices);
             glTexCoordPointer(2, GL_FIXED, 0, texCoords);
 
-            Rect r;
-            while (iterator.iterate(&r)) {
+            while (it != end) {
+                const Rect& r = *it++;
                 const GLint sy = fbHeight - (r.top + r.height());
                 glScissor(r.left, sy, r.width(), r.height());
                 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
@@ -488,15 +493,16 @@
             glDisableClientState(GL_TEXTURE_COORD_ARRAY);
         }
     } else {
-        Region::iterator iterator(clip);
-        if (iterator) {
-            Rect r;
+        Region::const_iterator it = clip.begin();
+        Region::const_iterator const end = clip.end();
+        if (it != end) {
             GLint crop[4] = { 0, height, width, -height };
             glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
             int x = tx();
             int y = ty();
             y = fbHeight - (y + height);
-            while (iterator.iterate(&r)) {
+            while (it != end) {
+                const Rect& r = *it++;
                 const GLint sy = fbHeight - (r.top + r.height());
                 glScissor(r.left, sy, r.width(), r.height());
                 glDrawTexiOES(x, y, 0, width, height);
diff --git a/libs/surfaceflinger/LayerBlur.cpp b/libs/surfaceflinger/LayerBlur.cpp
index cac3cf1..3d22e3a 100644
--- a/libs/surfaceflinger/LayerBlur.cpp
+++ b/libs/surfaceflinger/LayerBlur.cpp
@@ -136,8 +136,9 @@
         glGenTextures(1, &mTextureName);
     }
 
-    Region::iterator iterator(clip);
-    if (iterator) {
+    Region::const_iterator it = clip.begin();
+    Region::const_iterator const end = clip.end();
+    if (it != end) {
         glEnable(GL_TEXTURE_2D);
         glBindTexture(GL_TEXTURE_2D, mTextureName);
     
@@ -198,27 +199,25 @@
             glEnableClientState(GL_TEXTURE_COORD_ARRAY);
             glVertexPointer(2, GL_FIXED, 0, mVertices);
             glTexCoordPointer(2, GL_FIXED, 0, mVertices);
-            Rect r;
-            while (iterator.iterate(&r)) {
+            while (it != end) {
+                const Rect& r = *it++;
                 const GLint sy = fbHeight - (r.top + r.height());
                 glScissor(r.left, sy, r.width(), r.height());
                 glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
             }       
         } else {
-            Region::iterator iterator(clip);
-            if (iterator) {
-                // NOTE: this is marginally faster with the software gl, because
-                // glReadPixels() reads the fb bottom-to-top, however we'll
-                // skip all the jaccobian computations.
-                Rect r;
-                GLint crop[4] = { 0, 0, w, h };
-                glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
-                y = fbHeight - (y + h);
-                while (iterator.iterate(&r)) {
-                    const GLint sy = fbHeight - (r.top + r.height());
-                    glScissor(r.left, sy, r.width(), r.height());
-                    glDrawTexiOES(x, y, 0, w, h);
-                }
+            // NOTE: this is marginally faster with the software gl, because
+            // glReadPixels() reads the fb bottom-to-top, however we'll
+            // skip all the jaccobian computations.
+            Rect r;
+            GLint crop[4] = { 0, 0, w, h };
+            glTexParameteriv(GL_TEXTURE_2D, GL_TEXTURE_CROP_RECT_OES, crop);
+            y = fbHeight - (y + h);
+            while (it != end) {
+                const Rect& r = *it++;
+                const GLint sy = fbHeight - (r.top + r.height());
+                glScissor(r.left, sy, r.width(), r.height());
+                glDrawTexiOES(x, y, 0, w, h);
             }
         }
     }
diff --git a/libs/surfaceflinger/LayerDim.cpp b/libs/surfaceflinger/LayerDim.cpp
index f2519c4..c1e8ad6 100644
--- a/libs/surfaceflinger/LayerDim.cpp
+++ b/libs/surfaceflinger/LayerDim.cpp
@@ -52,8 +52,9 @@
     // FIXME: on some h/w (like msm7K, it will be faster to use a texture)
     
     const State& s(drawingState());
-    Region::iterator iterator(clip);
-    if (s.alpha>0 && iterator) {
+    Region::const_iterator it = clip.begin();
+    Region::const_iterator const end = clip.end();
+    if (s.alpha>0 && (it != end)) {
         const DisplayHardware& hw(graphicPlane(0).displayHardware());
         const GGLfixed alpha = (s.alpha << 16)/255;
         const uint32_t fbHeight = hw.getHeight();
@@ -63,8 +64,8 @@
         glBlendFunc(GL_ONE, GL_ONE_MINUS_SRC_ALPHA);
         glColor4x(0, 0, 0, alpha);
         glVertexPointer(2, GL_FIXED, 0, mVertices);
-        Rect r;
-        while (iterator.iterate(&r)) {
+        while (it != end) {
+            const Rect& r = *it++;
             const GLint sy = fbHeight - (r.top + r.height());
             glScissor(r.left, sy, r.width(), r.height());
             glDrawArrays(GL_TRIANGLE_FAN, 0, 4); 
diff --git a/libs/surfaceflinger/SurfaceFlinger.cpp b/libs/surfaceflinger/SurfaceFlinger.cpp
index b8c246c..e0728eb 100644
--- a/libs/surfaceflinger/SurfaceFlinger.cpp
+++ b/libs/surfaceflinger/SurfaceFlinger.cpp
@@ -913,9 +913,10 @@
         glColor4x(0x10000, 0x10000, 0, 0x10000);
     }
 
-    Rect r;
-    Region::iterator iterator(mDirtyRegion);
-    while (iterator.iterate(&r)) {
+    Region::const_iterator it = mDirtyRegion.begin();
+    Region::const_iterator const end = mDirtyRegion.end();
+    while (it != end) {
+        const Rect& r = *it++;
         GLfloat vertices[][2] = {
                 { r.left,  r.top },
                 { r.left,  r.bottom },
@@ -951,9 +952,10 @@
 
     if (LIKELY(!mDebugBackground)) {
         glClearColorx(0,0,0,0);
-        Rect r;
-        Region::iterator iterator(region);
-        while (iterator.iterate(&r)) {
+        Region::const_iterator it = region.begin();
+        Region::const_iterator const end = region.end();
+        while (it != end) {
+            const Rect& r = *it++;
             const GLint sy = height - (r.top + r.height());
             glScissor(r.left, sy, r.width(), r.height());
             glClear(GL_COLOR_BUFFER_BIT);
@@ -971,9 +973,10 @@
         glMatrixMode(GL_TEXTURE);
         glLoadIdentity();
         glScalef(width*(1.0f/32.0f), height*(1.0f/32.0f), 1);
-        Rect r;
-        Region::iterator iterator(region);
-        while (iterator.iterate(&r)) {
+        Region::const_iterator it = region.begin();
+        Region::const_iterator const end = region.end();
+        while (it != end) {
+            const Rect& r = *it++;
             const GLint sy = height - (r.top + r.height());
             glScissor(r.left, sy, r.width(), r.height());
             glDrawArrays(GL_TRIANGLE_FAN, 0, 4);
diff --git a/libs/surfaceflinger/Transform.cpp b/libs/surfaceflinger/Transform.cpp
index e8b0f45..1501536 100644
--- a/libs/surfaceflinger/Transform.cpp
+++ b/libs/surfaceflinger/Transform.cpp
@@ -177,10 +177,10 @@
     Region out;
     if (UNLIKELY(transformed())) {
         if (LIKELY(preserveRects())) {
-            Rect r;
-            Region::iterator iterator(reg);
-            while (iterator.iterate(&r)) {
-                out.orSelf(transform(r));
+            Region::const_iterator it = reg.begin();
+            Region::const_iterator const end = reg.end();
+            while (it != end) {
+                out.orSelf(transform(*it++));
             }
         } else {
             out.set(transform(reg.bounds()));