Merge "Allow starting an RT animation via Canvas"

core/java/android/view/GLES20RecordingCanvas.java

@@ -16,6 +16,7 @@
 
 package android.view;
 
+import android.annotation.NonNull;
 import android.util.Pools.SynchronizedPool;
 
 /**
@@ -32,19 +33,25 @@ class GLES20RecordingCanvas extends GLES20Canvas {
     private static final SynchronizedPool<GLES20RecordingCanvas> sPool =
             new SynchronizedPool<GLES20RecordingCanvas>(POOL_LIMIT);
 
+    RenderNode mNode;
+
     private GLES20RecordingCanvas() {
         super(true, true);
     }
 
-    static GLES20RecordingCanvas obtain() {
+    static GLES20RecordingCanvas obtain(@NonNull RenderNode node) {
+        if (node == null) throw new IllegalArgumentException("node cannot be null");
+
         GLES20RecordingCanvas canvas = sPool.acquire();
         if (canvas == null) {
             canvas = new GLES20RecordingCanvas();
         }
+        canvas.mNode = node;
         return canvas;
     }
 
     void recycle() {
+        mNode = null;
         sPool.release(this);
     }
 

core/java/android/view/RenderNode.java

@@ -239,7 +239,7 @@ public class RenderNode {
      * @see #isValid()
      */
     public HardwareCanvas start(int width, int height) {
-        HardwareCanvas canvas = GLES20RecordingCanvas.obtain();
+        HardwareCanvas canvas = GLES20RecordingCanvas.obtain(this);
         canvas.setViewport(width, height);
         // The dirty rect should always be null for a display list
         canvas.onPreDraw(null);

core/java/android/view/RenderNodeAnimator.java

@@ -16,6 +16,7 @@
 
 package android.view;
 
+import android.graphics.Canvas;
 import android.graphics.CanvasProperty;
 import android.graphics.Paint;
 import android.util.SparseIntArray;
@@ -100,6 +101,15 @@ public final class RenderNodeAnimator {
         target.invalidateViewProperty(true, false);
     }
 
+    public void start(Canvas canvas) {
+        if (!(canvas instanceof GLES20RecordingCanvas)) {
+            throw new IllegalArgumentException("Not a GLES20RecordingCanvas");
+        }
+        GLES20RecordingCanvas recordingCanvas = (GLES20RecordingCanvas) canvas;
+        mTarget = recordingCanvas.mNode;
+        mTarget.addAnimator(this);
+    }
+
     public void cancel() {
         mTarget.removeAnimator(this);
     }