Merge "Allow wallpaper surface in preview to scale to a rect" into rvc-d1-dev am: acb0a6ea12

Change-Id: I26e2b8ef86036703fe09440431e244e699f438ae

core/java/android/service/wallpaper/IWallpaperEngine.aidl

@@ -38,4 +38,5 @@ oneway interface IWallpaperEngine {
     @UnsupportedAppUsage
     void destroy();
     void setZoomOut(float scale);
+    void scalePreview(in Rect positionInWindow);
 }

core/java/android/service/wallpaper/WallpaperService.java

@@ -16,6 +16,11 @@
 
 package android.service.wallpaper;
 
+import static android.graphics.Matrix.MSCALE_X;
+import static android.graphics.Matrix.MSCALE_Y;
+import static android.graphics.Matrix.MSKEW_X;
+import static android.graphics.Matrix.MSKEW_Y;
+
 import android.annotation.FloatRange;
 import android.annotation.Nullable;
 import android.annotation.SdkConstant;
@@ -31,6 +36,7 @@ import android.content.Intent;
 import android.content.res.TypedArray;
 import android.graphics.Bitmap;
 import android.graphics.Canvas;
+import android.graphics.Matrix;
 import android.graphics.PixelFormat;
 import android.graphics.Point;
 import android.graphics.Rect;
@@ -123,7 +129,8 @@ public abstract class WallpaperService extends Service {
     private static final int MSG_WINDOW_MOVED = 10035;
     private static final int MSG_TOUCH_EVENT = 10040;
     private static final int MSG_REQUEST_WALLPAPER_COLORS = 10050;
-    private static final int MSG_SCALE = 10100;
+    private static final int MSG_ZOOM = 10100;
+    private static final int MSG_SCALE_PREVIEW = 10110;
 
     private static final int NOTIFY_COLORS_RATE_LIMIT_MS = 1000;
 
@@ -178,6 +185,7 @@ public abstract class WallpaperService extends Service {
                 WindowManager.LayoutParams.PRIVATE_FLAG_WANTS_OFFSET_NOTIFICATIONS;
         int mCurWindowFlags = mWindowFlags;
         int mCurWindowPrivateFlags = mWindowPrivateFlags;
+        Rect mPreviewSurfacePosition;
         final Rect mVisibleInsets = new Rect();
         final Rect mWinFrame = new Rect();
         final Rect mContentInsets = new Rect();
@@ -194,6 +202,8 @@ public abstract class WallpaperService extends Service {
         final InsetsSourceControl[] mTempControls = new InsetsSourceControl[0];
         final MergedConfiguration mMergedConfiguration = new MergedConfiguration();
         private final Point mSurfaceSize = new Point();
+        private final Matrix mTmpMatrix = new Matrix();
+        private final float[] mTmpValues = new float[9];
 
         final WindowManager.LayoutParams mLayout
                 = new WindowManager.LayoutParams();
@@ -366,7 +376,7 @@ public abstract class WallpaperService extends Service {
                         Message msg = mCaller.obtainMessage(MSG_WALLPAPER_OFFSETS);
                         mCaller.sendMessage(msg);
                     }
-                    Message msg = mCaller.obtainMessageI(MSG_SCALE, Float.floatToIntBits(zoom));
+                    Message msg = mCaller.obtainMessageI(MSG_ZOOM, Float.floatToIntBits(zoom));
                     mCaller.sendMessage(msg);
                 }
             }
@@ -747,6 +757,8 @@ public abstract class WallpaperService extends Service {
                     out.println(mMergedConfiguration.getMergedConfiguration());
             out.print(prefix); out.print("mLayout="); out.println(mLayout);
             out.print(prefix); out.print("mZoom="); out.println(mZoom);
+            out.print(prefix); out.print("mPreviewSurfacePosition=");
+                    out.println(mPreviewSurfacePosition);
             synchronized (mLock) {
                 out.print(prefix); out.print("mPendingXOffset="); out.print(mPendingXOffset);
                         out.print(" mPendingXOffset="); out.println(mPendingXOffset);
@@ -908,7 +920,6 @@ public abstract class WallpaperService extends Service {
                             mInsetsState, mTempControls, mSurfaceSize, mTmpSurfaceControl);
                     if (mSurfaceControl.isValid()) {
                         mSurfaceHolder.mSurface.copyFrom(mSurfaceControl);
-                        mSurfaceControl.release();
                     }
 
                     if (DEBUG) Log.v(TAG, "New surface: " + mSurfaceHolder.mSurface
@@ -1063,6 +1074,7 @@ public abstract class WallpaperService extends Service {
                         if (redrawNeeded) {
                             mSession.finishDrawing(mWindow, null /* postDrawTransaction */);
                         }
+                        reposition();
                         mIWallpaperEngine.reportShown();
                     }
                 } catch (RemoteException ex) {
@@ -1073,6 +1085,39 @@ public abstract class WallpaperService extends Service {
             }
         }
 
+        private void scalePreview(Rect position) {
+            if (isPreview() && mPreviewSurfacePosition == null && position != null
+                    || mPreviewSurfacePosition != null
+                    && !mPreviewSurfacePosition.equals(position)) {
+                mPreviewSurfacePosition = position;
+                if (mSurfaceControl.isValid()) {
+                    reposition();
+                } else {
+                    updateSurface(false, false, false);
+                }
+            }
+        }
+
+        private void reposition() {
+            if (mPreviewSurfacePosition == null) {
+                return;
+            }
+            if (DEBUG) {
+                Log.i(TAG, "reposition: rect: " + mPreviewSurfacePosition);
+            }
+
+            mTmpMatrix.setTranslate(mPreviewSurfacePosition.left, mPreviewSurfacePosition.top);
+            mTmpMatrix.postScale(((float) mPreviewSurfacePosition.width()) / mCurWidth,
+                    ((float) mPreviewSurfacePosition.height()) / mCurHeight);
+            mTmpMatrix.getValues(mTmpValues);
+            SurfaceControl.Transaction t = new SurfaceControl.Transaction();
+            t.setPosition(mSurfaceControl, mPreviewSurfacePosition.left,
+                    mPreviewSurfacePosition.top);
+            t.setMatrix(mSurfaceControl, mTmpValues[MSCALE_X], mTmpValues[MSKEW_Y],
+                    mTmpValues[MSKEW_X], mTmpValues[MSCALE_Y]);
+            t.apply();
+        }
+
         void attach(IWallpaperEngineWrapper wrapper) {
             if (DEBUG) Log.v(TAG, "attach: " + this + " wrapper=" + wrapper);
             if (mDestroyed) {
@@ -1414,7 +1459,7 @@ public abstract class WallpaperService extends Service {
         }
 
         public void setZoomOut(float scale) {
-            Message msg = mCaller.obtainMessageI(MSG_SCALE, Float.floatToIntBits(scale));
+            Message msg = mCaller.obtainMessageI(MSG_ZOOM, Float.floatToIntBits(scale));
             mCaller.sendMessage(msg);
         }
 
@@ -1444,6 +1489,11 @@ public abstract class WallpaperService extends Service {
             mDetached.set(true);
         }
 
+        public void scalePreview(Rect position) {
+            Message msg = mCaller.obtainMessageO(MSG_SCALE_PREVIEW, position);
+            mCaller.sendMessage(msg);
+        }
+
         private void doDetachEngine() {
             mActiveEngines.remove(mEngine);
             mEngine.detach();
@@ -1490,9 +1540,12 @@ public abstract class WallpaperService extends Service {
                 case MSG_UPDATE_SURFACE:
                     mEngine.updateSurface(true, false, false);
                     break;
-                case MSG_SCALE:
+                case MSG_ZOOM:
                     mEngine.setZoom(Float.intBitsToFloat(message.arg1));
                     break;
+                case MSG_SCALE_PREVIEW:
+                    mEngine.scalePreview((Rect) message.obj);
+                    break;
                 case MSG_VISIBILITY_CHANGED:
                     if (DEBUG) Log.v(TAG, "Visibility change in " + mEngine
                             + ": " + message.arg1);