Enable display lists.

Change-Id: Id0d9b987251da5b7ecbb5497a55dbb5937430316

4 files changed, 23 insertions, 6 deletions

diff --git a/core/java/android/view/View.java b/core/java/android/view/View.java
index 0456463..87e03cf 100644
--- a/core/java/android/view/View.java
+++ b/core/java/android/view/View.java
@@ -7579,6 +7579,11 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
      * the auto scaling to true. Doing so, however, will generate a bitmap of a different
      * size than the view. This implies that your application must be able to handle this
      * size.</p>
+     * 
+     * <p>You should avoid calling this method when hardware acceleration is enabled. If
+     * you do not need the drawing cache bitmap, calling this method will increase memory
+     * usage and cause the view to be rendered in software once, thus negatively impacting 
+     * performance.</p>
      *
      * @see #getDrawingCache()
      * @see #destroyDrawingCache()
@@ -7699,7 +7704,9 @@ public class View implements Drawable.Callback, KeyEvent.Callback, Accessibility
             canvas.translate(-mScrollX, -mScrollY);
 
             mPrivateFlags |= DRAWN;
-            mPrivateFlags |= DRAWING_CACHE_VALID;
+            if (mAttachInfo == null || !mAttachInfo.mHardwareAccelerated) {
+                mPrivateFlags |= DRAWING_CACHE_VALID;
+            }
 
             // Fast path for layouts with no backgrounds
             if ((mPrivateFlags & SKIP_DRAW) == SKIP_DRAW) {
diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index 7b2703b..b881bdd 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -1867,12 +1867,15 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
         if ((mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE) {
             final int count = mChildrenCount;
             final View[] children = mChildren;
+            final boolean buildCache = !isHardwareAccelerated();
 
             for (int i = 0; i < count; i++) {
                 final View child = children[i];
                 if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
                     child.setDrawingCacheEnabled(true);
-                    child.buildDrawingCache(true);
+                    if (buildCache) {
+                        child.buildDrawingCache(true);
+                    }
                 }
             }
 
@@ -1933,6 +1936,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
         if ((flags & FLAG_RUN_ANIMATION) != 0 && canAnimate()) {
             final boolean cache = (mGroupFlags & FLAG_ANIMATION_CACHE) == FLAG_ANIMATION_CACHE;
 
+            final boolean buildCache = !isHardwareAccelerated();
             for (int i = 0; i < count; i++) {
                 final View child = children[i];
                 if ((child.mViewFlags & VISIBILITY_MASK) == VISIBLE) {
@@ -1941,7 +1945,9 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
                     bindLayoutAnimation(child);
                     if (cache) {
                         child.setDrawingCacheEnabled(true);
-                        child.buildDrawingCache(true);
+                        if (buildCache) {                        
+                            child.buildDrawingCache(true);
+                        }
                     }
                 }
             }
@@ -2205,8 +2211,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
             if (!canvas.isHardwareAccelerated()) {
                 cache = child.getDrawingCache(true);
             } else {
-                // TODO: bring back
-                // displayList = child.getDisplayList();
+                displayList = child.getDisplayList();
             }
         }
 
diff --git a/core/java/android/view/ViewRoot.java b/core/java/android/view/ViewRoot.java
index 2e368b8..06261bb 100644
--- a/core/java/android/view/ViewRoot.java
+++ b/core/java/android/view/ViewRoot.java
@@ -561,6 +561,11 @@ public final class ViewRoot extends Handler implements ViewParent, View.AttachIn
             scheduleTraversals();
         }
     }
+    
+    void invalidate() {
+        mDirty.set(0, 0, mWidth, mHeight);
+        scheduleTraversals();
+    }
 
     public ViewParent getParent() {
         return null;
diff --git a/core/java/android/widget/SlidingDrawer.java b/core/java/android/widget/SlidingDrawer.java
index 11d72de..bdeb5c2 100644
--- a/core/java/android/widget/SlidingDrawer.java
+++ b/core/java/android/widget/SlidingDrawer.java
@@ -652,7 +652,7 @@ public class SlidingDrawer extends ViewGroup {
         // Try only once... we should really loop but it's not a big deal
         // if the draw was cancelled, it will only be temporary anyway
         content.getViewTreeObserver().dispatchOnPreDraw();
-        content.buildDrawingCache();
+        if (!content.isHardwareAccelerated()) content.buildDrawingCache();
 
         content.setVisibility(View.GONE);        
     }