Allow custom density setting

Use system property persist.sys.lcd_density to set custom density.  The
custom setting affects the entire UI.  It is independent of
ro.sf.lcd_density and has no effect on play store compatibility.

Code distilled from PA project via PAC project.

Change-Id: I8d26405d5d33bdf2890a0e9f67f113a4dc3e763b

2 files changed, 3 insertions, 9 deletions

diff --git a/graphics/java/android/graphics/Bitmap.java b/graphics/java/android/graphics/Bitmap.java
index 3e4d93b..3279185 100644
--- a/graphics/java/android/graphics/Bitmap.java
+++ b/graphics/java/android/graphics/Bitmap.java
@@ -80,24 +80,18 @@ public final class Bitmap implements Parcelable {
 
     private static volatile Matrix sScaleMatrix;
 
-    private static volatile int sDefaultDensity = -1;
-
     /**
      * For backwards compatibility, allows the app layer to change the default
      * density when running old apps.
      * @hide
      */
     public static void setDefaultDensity(int density) {
-        sDefaultDensity = density;
+        // Ignore
     }
 
     @SuppressWarnings("deprecation")
     static int getDefaultDensity() {
-        if (sDefaultDensity >= 0) {
-            return sDefaultDensity;
-        }
-        sDefaultDensity = DisplayMetrics.DENSITY_DEVICE;
-        return sDefaultDensity;
+        return DisplayMetrics.getDeviceDensity();
     }
 
     /**
diff --git a/graphics/java/android/graphics/drawable/Drawable.java b/graphics/java/android/graphics/drawable/Drawable.java
index 32af59a..7bd445f 100644
--- a/graphics/java/android/graphics/drawable/Drawable.java
+++ b/graphics/java/android/graphics/drawable/Drawable.java
@@ -1076,7 +1076,7 @@ public abstract class Drawable {
         // drawn to the screen.
         if (opts == null) opts = new BitmapFactory.Options();
         opts.inScreenDensity = res != null
-                ? res.getDisplayMetrics().noncompatDensityDpi : DisplayMetrics.DENSITY_DEVICE;
+                ? res.getDisplayMetrics().noncompatDensityDpi : DisplayMetrics.getDeviceDensity();
         Bitmap  bm = BitmapFactory.decodeResourceStream(res, value, is, pad, opts);
         if (bm != null) {
             byte[] np = bm.getNinePatchChunk();