From 3b777cb9b18c3e6f8549cd25695600cd7dd3010b Mon Sep 17 00:00:00 2001
From: Adrian Roos <roosa@google.com>
Date: Thu, 14 Apr 2016 12:04:28 -0700
Subject: [PATCH] Fix LockscreenWallpaper panning

Bug: 27484494
Change-Id: Ic74b447213fcad5b7ca5107c5a0ebd9e76276ea6
---
 .../statusbar/phone/LockscreenWallpaper.java  | 57 +++++++++++++++++++
 .../statusbar/phone/PhoneStatusBar.java       | 19 +++++--
 2 files changed, 71 insertions(+), 5 deletions(-)

diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/LockscreenWallpaper.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/LockscreenWallpaper.java
index 3812429b5f054..92f3585f43efe 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/LockscreenWallpaper.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/LockscreenWallpaper.java
@@ -21,8 +21,12 @@ import android.app.IWallpaperManager;
 import android.app.IWallpaperManagerCallback;
 import android.app.WallpaperManager;
 import android.content.Context;
+import android.content.res.Resources;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
+import android.graphics.Rect;
+import android.graphics.drawable.BitmapDrawable;
+import android.graphics.drawable.DrawableWrapper;
 import android.os.Bundle;
 import android.os.Handler;
 import android.os.ParcelFileDescriptor;
@@ -151,4 +155,57 @@ public class LockscreenWallpaper extends IWallpaperManagerCallback.Stub implemen
         getBitmap();
         mBar.updateMediaMetaData(true /* metaDataChanged */, true /* allowEnterAnimation */);
     }
+
+    /**
+     * Drawable that aligns left horizontally and center vertically (like ImageWallpaper).
+     */
+    public static class WallpaperDrawable extends DrawableWrapper {
+
+        private Bitmap mBackground;
+        private Rect mTmpRect = new Rect();
+
+        public WallpaperDrawable(Resources r, Bitmap b) {
+            super(new BitmapDrawable(r, b));
+            mBackground = b;
+        }
+
+        @Override
+        public int getIntrinsicWidth() {
+            return -1;
+        }
+
+        @Override
+        public int getIntrinsicHeight() {
+            return -1;
+        }
+
+        @Override
+        protected void onBoundsChange(Rect bounds) {
+            int vwidth = getBounds().width();
+            int vheight = getBounds().height();
+            int dwidth = mBackground.getWidth();
+            int dheight = mBackground.getHeight();
+            float scale;
+            float dx = 0, dy = 0;
+
+            if (dwidth * vheight > vwidth * dheight) {
+                scale = (float) vheight / (float) dheight;
+            } else {
+                scale = (float) vwidth / (float) dwidth;
+            }
+
+            if (scale <= 1f) {
+                scale = 1f;
+            }
+            dy = (vheight - dheight * scale) * 0.5f;
+
+            mTmpRect.set(
+                    bounds.left,
+                    bounds.top + Math.round(dy),
+                    bounds.left + Math.round(dwidth * scale),
+                    bounds.top + Math.round(dheight * scale + dy));
+
+            super.onBoundsChange(mTmpRect);
+        }
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
index 3ca0a6d012398..b6fc66b673c15 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/PhoneStatusBar.java
@@ -46,6 +46,7 @@ import android.graphics.PointF;
 import android.graphics.PorterDuff;
 import android.graphics.PorterDuffXfermode;
 import android.graphics.Rect;
+import android.graphics.drawable.BitmapDrawable;
 import android.graphics.drawable.ColorDrawable;
 import android.graphics.drawable.Drawable;
 import android.inputmethodservice.InputMethodService;
@@ -1928,19 +1929,27 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
                     + " state=" + mState);
         }
 
-        Bitmap artworkBitmap = null;
+        Drawable artworkDrawable = null;
         if (mMediaMetadata != null) {
+            Bitmap artworkBitmap = null;
             artworkBitmap = mMediaMetadata.getBitmap(MediaMetadata.METADATA_KEY_ART);
             if (artworkBitmap == null) {
                 artworkBitmap = mMediaMetadata.getBitmap(MediaMetadata.METADATA_KEY_ALBUM_ART);
                 // might still be null
             }
+            if (artworkBitmap != null) {
+                artworkDrawable = new BitmapDrawable(mBackdropBack.getResources(), artworkBitmap);
+            }
         }
-        if (ENABLE_LOCKSCREEN_WALLPAPER && artworkBitmap == null) {
-            artworkBitmap = mLockscreenWallpaper.getBitmap();
+        if (ENABLE_LOCKSCREEN_WALLPAPER && artworkDrawable == null) {
+            Bitmap lockWallpaper = mLockscreenWallpaper.getBitmap();
+            if (lockWallpaper != null) {
+                artworkDrawable = new LockscreenWallpaper.WallpaperDrawable(
+                        mBackdropBack.getResources(), lockWallpaper);
+            }
         }
 
-        final boolean hasArtwork = artworkBitmap != null;
+        final boolean hasArtwork = artworkDrawable != null;
 
         if ((hasArtwork || DEBUG_MEDIA_FAKE_ARTWORK) && mState != StatusBarState.SHADE
                 && mFingerprintUnlockController.getMode()
@@ -1985,7 +1994,7 @@ public class PhoneStatusBar extends BaseStatusBar implements DemoMode,
                     mBackdropBack.setBackgroundColor(0xFFFFFFFF);
                     mBackdropBack.setImageDrawable(new ColorDrawable(c));
                 } else {
-                    mBackdropBack.setImageBitmap(artworkBitmap);
+                    mBackdropBack.setImageDrawable(artworkDrawable);
                 }
                 if (mScrimSrcModeEnabled) {
                     mBackdropBack.getDrawable().mutate().setXfermode(mSrcXferMode);