Create z reordering boundaries around dispatchDraw

bug:16012254

This means rendernodes with a Z will no longer be drawn at the end of
their parent's DisplayList, but at the end of the associated reorder
region (DisplayListData::Chunk).

Change-Id: Ia033fee9d9a4db567b2a8d5e90fc57a4d0a64544

2 files changed, 14 insertions, 1 deletions

diff --git a/core/java/android/view/GLES20Canvas.java b/core/java/android/view/GLES20Canvas.java
index a410aa9..ceea9f8 100644
--- a/core/java/android/view/GLES20Canvas.java
+++ b/core/java/android/view/GLES20Canvas.java
@@ -179,6 +179,18 @@ class GLES20Canvas extends HardwareCanvas {
     private static native void nSetHighContrastText(long renderer, boolean highContrastText);
 
     @Override
+    public void insertReorderBarrier() {
+        nInsertReorderBarrier(mRenderer, true);
+    }
+
+    @Override
+    public void insertInorderBarrier() {
+        nInsertReorderBarrier(mRenderer, false);
+    }
+
+    private static native void nInsertReorderBarrier(long renderer, boolean enableReorder);
+
+    @Override
     public int onPreDraw(Rect dirty) {
         if (dirty != null) {
             return nPrepareDirty(mRenderer, dirty.left, dirty.top, dirty.right, dirty.bottom,
diff --git a/core/java/android/view/ViewGroup.java b/core/java/android/view/ViewGroup.java
index 19dd583..854e6be 100644
--- a/core/java/android/view/ViewGroup.java
+++ b/core/java/android/view/ViewGroup.java
@@ -3072,7 +3072,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
         boolean more = false;
         final long drawingTime = getDrawingTime();
 
-
+        if (usingRenderNodeProperties) canvas.insertReorderBarrier();
         // Only use the preordered list if not HW accelerated, since the HW pipeline will do the
         // draw reordering internally
         final ArrayList<View> preorderedList = usingRenderNodeProperties
@@ -3099,6 +3099,7 @@ public abstract class ViewGroup extends View implements ViewParent, ViewManager
                 more |= drawChild(canvas, child, drawingTime);
             }
         }
+        if (usingRenderNodeProperties) canvas.insertInorderBarrier();
 
         if (debugDraw()) {
             onDebugDraw(canvas);