Various cleanup around resources and nine-patches.

Remove the stuff that doesn't use preloaded drawables when in
compatibility mode, since this works fine ever since we were able
to deal with drawables in a different density than the canvas.

Change the snapshot function on View to return a snapshot at
the same size that will actually be drawn on screen (when in
compatibility mode), to be able to show scaling artifacts and
all.

This change was original an attempt to fix issue #2101917: Text
field edges appears to be improperly rounded.  That turns out to
probably be something deeper in the graphics system, but also
included here is the debugging code I did to try to track down the
problem to make it easy to turn on again later.

Change-Id: I34bfca629639c7ff103f3989d88874112ef778d9

core/java/android/content/res/AssetManager.java

@@ -24,7 +24,6 @@ import android.util.TypedValue;
 import java.io.FileNotFoundException;
 import java.io.IOException;
 import java.io.InputStream;
-import java.util.Locale;
 
 /**
  * Provides access to an application's raw asset files; see {@link Resources}

core/java/android/content/res/Resources.java

@@ -66,8 +66,6 @@ public class Resources {
             = new SparseArray<ColorStateList>();
     private static boolean mPreloaded;
 
-    private final LongSparseArray<Drawable.ConstantState> mPreloadedDrawables;
-
     /*package*/ final TypedValue mTmpValue = new TypedValue();
 
     // These are protected by the mTmpValue lock.
@@ -158,11 +156,6 @@ public class Resources {
         }
         updateConfiguration(config, metrics);
         assets.ensureStringBlocks();
-        if (mCompatibilityInfo.isScalingRequired()) {
-            mPreloadedDrawables = emptySparseArray();
-        } else {
-            mPreloadedDrawables = sPreloadedDrawables;
-        }
     }
 
     /**
@@ -1669,7 +1662,7 @@ public class Resources {
             return dr;
         }
 
-        Drawable.ConstantState cs = mPreloadedDrawables.get(key);
+        Drawable.ConstantState cs = sPreloadedDrawables.get(key);
         if (cs != null) {
             dr = cs.newDrawable();
         } else {
@@ -1976,7 +1969,6 @@ public class Resources {
         mMetrics.setToDefaults();
         updateConfiguration(null, null);
         mAssets.ensureStringBlocks();
-        mPreloadedDrawables = sPreloadedDrawables;
         mCompatibilityInfo = CompatibilityInfo.DEFAULT_COMPATIBILITY_INFO;
     }
 }

core/java/android/view/View.java

@@ -6038,16 +6038,23 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
      * some form of this public, but should think about the API.
      */
     Bitmap createSnapshot(Bitmap.Config quality, int backgroundColor) {
-        final int width = mRight - mLeft;
-        final int height = mBottom - mTop;
+        int width = mRight - mLeft;
+        int height = mBottom - mTop;
 
-        Bitmap bitmap = Bitmap.createBitmap(width, height, quality);
+        final AttachInfo attachInfo = mAttachInfo;
+        final float scale = attachInfo.mApplicationScale;
+        width = (int) ((width * scale) + 0.5f);
+        height = (int) ((height * scale) + 0.5f);
+        
+        Bitmap bitmap = Bitmap.createBitmap(width > 0 ? width : 1,
+                height > 0 ? height : 1, quality);
         if (bitmap == null) {
             throw new OutOfMemoryError();
         }
 
+        bitmap.setDensity(getResources().getDisplayMetrics().densityDpi);
+        
         Canvas canvas;
-        final AttachInfo attachInfo = mAttachInfo;
         if (attachInfo != null) {
             canvas = attachInfo.mCanvas;
             if (canvas == null) {
@@ -6070,6 +6077,7 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
 
         computeScroll();
         final int restoreCount = canvas.save();
+        canvas.scale(scale, scale);
         canvas.translate(-mScrollX, -mScrollY);
 
         // Temporarily remove the dirty mask