1 files changed, 110 insertions, 13 deletions

diff --git a/core/java/android/view/Surface.java b/core/java/android/view/Surface.java
index 3770b8a..132e25c 100644
--- a/core/java/android/view/Surface.java
+++ b/core/java/android/view/Surface.java
@@ -87,6 +87,8 @@ public class Surface implements Parcelable {
     // non compatibility mode.
     private Matrix mCompatibleMatrix;
 
+    private HwuiContext mHwuiContext;
+
     /** @hide */
     @IntDef({ROTATION_0, ROTATION_90, ROTATION_180, ROTATION_270})
     @Retention(RetentionPolicy.SOURCE)
@@ -171,6 +173,10 @@ public class Surface implements Parcelable {
                 nativeRelease(mNativeObject);
                 setNativeObjectLocked(0);
             }
+            if (mHwuiContext != null) {
+                mHwuiContext.destroy();
+                mHwuiContext = null;
+            }
         }
     }
 
@@ -264,27 +270,60 @@ public class Surface implements Parcelable {
      * @param canvas The canvas previously obtained from {@link #lockCanvas}.
      */
     public void unlockCanvasAndPost(Canvas canvas) {
+        synchronized (mLock) {
+            checkNotReleasedLocked();
+
+            if (mHwuiContext != null) {
+                mHwuiContext.unlockAndPost(canvas);
+            } else {
+                unlockSwCanvasAndPost(canvas);
+            }
+        }
+    }
+
+    private void unlockSwCanvasAndPost(Canvas canvas) {
         if (canvas != mCanvas) {
             throw new IllegalArgumentException("canvas object must be the same instance that "
                     + "was previously returned by lockCanvas");
         }
+        if (mNativeObject != mLockedObject) {
+            Log.w(TAG, "WARNING: Surface's mNativeObject (0x" +
+                    Long.toHexString(mNativeObject) + ") != mLockedObject (0x" +
+                    Long.toHexString(mLockedObject) +")");
+        }
+        if (mLockedObject == 0) {
+            throw new IllegalStateException("Surface was not locked");
+        }
+        try {
+            nativeUnlockCanvasAndPost(mLockedObject, canvas);
+        } finally {
+            nativeRelease(mLockedObject);
+            mLockedObject = 0;
+        }
+    }
 
+    /**
+     * Gets a {@link Canvas} for drawing into this surface.
+     *
+     * After drawing into the provided {@link Canvas}, the caller must
+     * invoke {@link #unlockCanvasAndPost} to post the new contents to the surface.
+     *
+     * Unlike {@link #lockCanvas(Rect)} this will return a hardware-accelerated
+     * canvas. See the <a href="{@docRoot}guide/topics/graphics/hardware-accel.html#unsupported">
+     * unsupported drawing operations</a> for a list of what is and isn't
+     * supported in a hardware-accelerated canvas.
+     *
+     * @return A canvas for drawing into the surface.
+     *
+     * @throws IllegalStateException If the canvas cannot be locked.
+     */
+    public Canvas lockHardwareCanvas() {
         synchronized (mLock) {
             checkNotReleasedLocked();
-            if (mNativeObject != mLockedObject) {
-                Log.w(TAG, "WARNING: Surface's mNativeObject (0x" +
-                        Long.toHexString(mNativeObject) + ") != mLockedObject (0x" +
-                        Long.toHexString(mLockedObject) +")");
-            }
-            if (mLockedObject == 0) {
-                throw new IllegalStateException("Surface was not locked");
-            }
-            try {
-                nativeUnlockCanvasAndPost(mLockedObject, canvas);
-            } finally {
-                nativeRelease(mLockedObject);
-                mLockedObject = 0;
+            if (mHwuiContext == null) {
+                mHwuiContext = new HwuiContext();
             }
+            return mHwuiContext.lockCanvas();
         }
     }
 
@@ -415,6 +454,9 @@ public class Surface implements Parcelable {
             }
             mNativeObject = ptr;
             mGenerationId += 1;
+            if (mHwuiContext != null) {
+                mHwuiContext.updateSurface();
+            }
         }
     }
 
@@ -518,4 +560,59 @@ public class Surface implements Parcelable {
             mOrigMatrix.set(m);
         }
     }
+
+    private final class HwuiContext {
+        private final RenderNode mRenderNode;
+        private long mHwuiRenderer;
+        private HardwareCanvas mCanvas;
+
+        HwuiContext() {
+            mRenderNode = RenderNode.create("HwuiCanvas", null);
+            mRenderNode.setClipToBounds(false);
+            mHwuiRenderer = nHwuiCreate(mRenderNode.mNativeRenderNode, mNativeObject);
+        }
+
+        Canvas lockCanvas() {
+            if (mCanvas != null) {
+                throw new IllegalStateException("Surface was already locked!");
+            }
+            mCanvas = mRenderNode.start(0, 0);
+            return mCanvas;
+        }
+
+        void unlockAndPost(Canvas canvas) {
+            if (canvas != mCanvas) {
+                throw new IllegalArgumentException("canvas object must be the same instance that "
+                        + "was previously returned by lockCanvas");
+            }
+            mRenderNode.end(mCanvas);
+            mCanvas = null;
+            nHwuiDraw(mHwuiRenderer);
+        }
+
+        void updateSurface() {
+            nHwuiSetSurface(mHwuiRenderer, mNativeObject);
+        }
+
+        void destroy() {
+            if (mHwuiRenderer != 0) {
+                nHwuiDestroy(mHwuiRenderer);
+                mHwuiRenderer = 0;
+            }
+        }
+
+        @Override
+        protected void finalize() throws Throwable {
+            try {
+                destroy();
+            } finally {
+                super.finalize();
+            }
+        }
+    }
+
+    private static native long nHwuiCreate(long rootNode, long surface);
+    private static native void nHwuiSetSurface(long renderer, long surface);
+    private static native void nHwuiDraw(long renderer);
+    private static native void nHwuiDestroy(long renderer);
 }