1// Copyright 2012 Google Inc. All Rights Reserved.
2
3package com.android.server.wm;
4
5import static android.view.WindowManager.LayoutParams.TYPE_APPLICATION_STARTING;
6import static android.view.WindowManager.LayoutParams.TYPE_WALLPAPER;
7
8import static com.android.server.wm.WindowManagerService.LayoutFields.CLEAR_ORIENTATION_CHANGE_COMPLETE;
9import static com.android.server.wm.WindowManagerService.LayoutFields.SET_TURN_ON_SCREEN;
10
11import android.content.Context;
12import android.graphics.Matrix;
13import android.graphics.PixelFormat;
14import android.graphics.Point;
15import android.graphics.PointF;
16import android.graphics.Rect;
17import android.graphics.Region;
18import android.os.Debug;
19import android.util.Slog;
20import android.view.Surface;
21import android.view.SurfaceSession;
22import android.view.WindowManager;
23import android.view.WindowManagerPolicy;
24import android.view.WindowManager.LayoutParams;
25import android.view.animation.Animation;
26import android.view.animation.AnimationUtils;
27import android.view.animation.Transformation;
28
29import com.android.server.wm.WindowManagerService.H;
30
31import java.io.PrintWriter;
32import java.util.ArrayList;
33
34/**
35 * Keep track of animations and surface operations for a single WindowState.
36 **/
37class WindowStateAnimator {
38    static final boolean DEBUG_VISIBILITY = WindowManagerService.DEBUG_VISIBILITY;
39    static final boolean DEBUG_ANIM = WindowManagerService.DEBUG_ANIM;
40    static final boolean DEBUG_LAYERS = WindowManagerService.DEBUG_LAYERS;
41    static final boolean DEBUG_STARTING_WINDOW = WindowManagerService.DEBUG_STARTING_WINDOW;
42    static final boolean SHOW_TRANSACTIONS = WindowManagerService.SHOW_TRANSACTIONS;
43    static final boolean SHOW_LIGHT_TRANSACTIONS = WindowManagerService.SHOW_LIGHT_TRANSACTIONS;
44    static final boolean SHOW_SURFACE_ALLOC = WindowManagerService.SHOW_SURFACE_ALLOC;
45    static final boolean localLOGV = WindowManagerService.localLOGV;
46    static final boolean DEBUG_ORIENTATION = WindowManagerService.DEBUG_ORIENTATION;
47    static final boolean DEBUG_SURFACE_TRACE = WindowManagerService.DEBUG_SURFACE_TRACE;
48
49    static final String TAG = "WindowStateAnimator";
50
51    final WindowManagerService mService;
52    final WindowState mWin;
53    final WindowState mAttachedWindow;
54    final WindowAnimator mAnimator;
55    final Session mSession;
56    final WindowManagerPolicy mPolicy;
57    final Context mContext;
58
59    // Currently running animation.
60    boolean mAnimating;
61    boolean mLocalAnimating;
62    Animation mAnimation;
63    boolean mAnimationIsEntrance;
64    boolean mHasTransformation;
65    boolean mHasLocalTransformation;
66    final Transformation mTransformation = new Transformation();
67    boolean mWasAnimating;      // Were we animating going into the most recent animation step?
68    int mAnimLayer;
69    int mLastLayer;
70
71    Surface mSurface;
72    Surface mPendingDestroySurface;
73
74    /**
75     * Set when we have changed the size of the surface, to know that
76     * we must tell them application to resize (and thus redraw itself).
77     */
78    boolean mSurfaceResized;
79
80    /**
81     * Set if the client has asked that the destroy of its surface be delayed
82     * until it explicitly says it is okay.
83     */
84    boolean mSurfaceDestroyDeferred;
85
86    float mShownAlpha = 0;
87    float mAlpha = 0;
88    float mLastAlpha = 0;
89
90    // Used to save animation distances between the time they are calculated and when they are
91    // used.
92    int mAnimDw;
93    int mAnimDh;
94    float mDsDx=1, mDtDx=0, mDsDy=0, mDtDy=1;
95    float mLastDsDx=1, mLastDtDx=0, mLastDsDy=0, mLastDtDy=1;
96
97    boolean mHaveMatrix;
98
99    // For debugging, this is the last information given to the surface flinger.
100    boolean mSurfaceShown;
101    float mSurfaceX, mSurfaceY, mSurfaceW, mSurfaceH;
102    int mSurfaceLayer;
103    float mSurfaceAlpha;
104
105    // Set to true if, when the window gets displayed, it should perform
106    // an enter animation.
107    boolean mEnterAnimationPending;
108
109    /** This is set when there is no Surface */
110    static final int NO_SURFACE = 0;
111    /** This is set after the Surface has been created but before the window has been drawn. During
112     * this time the surface is hidden. */
113    static final int DRAW_PENDING = 1;
114    /** This is set after the window has finished drawing for the first time but before its surface
115     * is shown.  The surface will be displayed when the next layout is run. */
116    static final int COMMIT_DRAW_PENDING = 2;
117    /** This is set during the time after the window's drawing has been committed, and before its
118     * surface is actually shown.  It is used to delay showing the surface until all windows in a
119     * token are ready to be shown. */
120    static final int READY_TO_SHOW = 3;
121    /** Set when the window has been shown in the screen the first time. */
122    static final int HAS_DRAWN = 4;
123    static String drawStateToString(int state) {
124        switch (state) {
125            case NO_SURFACE: return "NO_SURFACE";
126            case DRAW_PENDING: return "DRAW_PENDING";
127            case COMMIT_DRAW_PENDING: return "COMMIT_DRAW_PENDING";
128            case READY_TO_SHOW: return "READY_TO_SHOW";
129            case HAS_DRAWN: return "HAS_DRAWN";
130            default: return Integer.toString(state);
131        }
132    }
133    int mDrawState;
134
135    /** Was this window last hidden? */
136    boolean mLastHidden;
137
138    int mAttrFlags;
139    int mAttrType;
140
141    public WindowStateAnimator(final WindowManagerService service, final WindowState win,
142                               final WindowState attachedWindow) {
143        mService = service;
144        mWin = win;
145        mAttachedWindow = attachedWindow;
146        mAnimator = mService.mAnimator;
147        mSession = win.mSession;
148        mPolicy = mService.mPolicy;
149        mContext = mService.mContext;
150        mAttrFlags = win.mAttrs.flags;
151        mAttrType = win.mAttrs.type;
152        mAnimDw = service.mAppDisplayWidth;
153        mAnimDh = service.mAppDisplayHeight;
154    }
155
156    public void setAnimation(Animation anim) {
157        if (localLOGV) Slog.v(TAG, "Setting animation in " + this + ": " + anim);
158        mAnimating = false;
159        mLocalAnimating = false;
160        mAnimation = anim;
161        mAnimation.restrictDuration(WindowManagerService.MAX_ANIMATION_DURATION);
162        mAnimation.scaleCurrentDuration(mService.mWindowAnimationScale);
163        // Start out animation gone if window is gone, or visible if window is visible.
164        mTransformation.clear();
165        mTransformation.setAlpha(mLastHidden ? 0 : 1);
166        mHasLocalTransformation = true;
167    }
168
169    public void clearAnimation() {
170        if (mAnimation != null) {
171            mAnimating = true;
172            mLocalAnimating = false;
173            mAnimation.cancel();
174            mAnimation = null;
175        }
176    }
177
178    /** Is the window or its container currently animating? */
179    boolean isAnimating() {
180        final WindowState attached = mAttachedWindow;
181        final AppWindowToken atoken = mWin.mAppToken;
182        return mAnimation != null
183                || (attached != null && attached.mWinAnimator.mAnimation != null)
184                || (atoken != null &&
185                        (atoken.mAppAnimator.animation != null
186                                || atoken.inPendingTransaction));
187    }
188
189    /** Is the window animating the DummyAnimation? */
190    boolean isDummyAnimation() {
191        final AppWindowToken atoken = mWin.mAppToken;
192        return atoken != null
193                && atoken.mAppAnimator.animation == AppWindowAnimator.sDummyAnimation;
194    }
195
196    /** Is this window currently animating? */
197    boolean isWindowAnimating() {
198        return mAnimation != null;
199    }
200
201    void cancelExitAnimationForNextAnimationLocked() {
202        if (mAnimation != null) {
203            mAnimation.cancel();
204            mAnimation = null;
205            mLocalAnimating = false;
206            destroySurfaceLocked();
207        }
208    }
209
210    private boolean stepAnimation(long currentTime) {
211        if ((mAnimation == null) || !mLocalAnimating) {
212            return false;
213        }
214        mTransformation.clear();
215        final boolean more = mAnimation.getTransformation(currentTime, mTransformation);
216        if (DEBUG_ANIM) Slog.v(
217            TAG, "Stepped animation in " + this +
218            ": more=" + more + ", xform=" + mTransformation);
219        return more;
220    }
221
222    // This must be called while inside a transaction.  Returns true if
223    // there is more animation to run.
224    boolean stepAnimationLocked(long currentTime) {
225        // Save the animation state as it was before this step so WindowManagerService can tell if
226        // we just started or just stopped animating by comparing mWasAnimating with isAnimating().
227        mWasAnimating = mAnimating;
228        if (mService.okToDisplay()) {
229            // We will run animations as long as the display isn't frozen.
230
231            if (mWin.isDrawnLw() && mAnimation != null) {
232                mHasTransformation = true;
233                mHasLocalTransformation = true;
234                if (!mLocalAnimating) {
235                    if (DEBUG_ANIM) Slog.v(
236                        TAG, "Starting animation in " + this +
237                        " @ " + currentTime + ": ww=" + mWin.mFrame.width() +
238                        " wh=" + mWin.mFrame.height() +
239                        " dw=" + mAnimDw + " dh=" + mAnimDh +
240                        " scale=" + mService.mWindowAnimationScale);
241                    mAnimation.initialize(mWin.mFrame.width(), mWin.mFrame.height(),
242                            mAnimDw, mAnimDh);
243                    mAnimDw = mService.mAppDisplayWidth;
244                    mAnimDh = mService.mAppDisplayHeight;
245                    mAnimation.setStartTime(currentTime);
246                    mLocalAnimating = true;
247                    mAnimating = true;
248                }
249                if ((mAnimation != null) && mLocalAnimating) {
250                    if (stepAnimation(currentTime)) {
251                        return true;
252                    }
253                }
254                if (DEBUG_ANIM) Slog.v(
255                    TAG, "Finished animation in " + this +
256                    " @ " + currentTime);
257                //WindowManagerService.this.dump();
258            }
259            mHasLocalTransformation = false;
260            if ((!mLocalAnimating || mAnimationIsEntrance) && mWin.mAppToken != null
261                    && mWin.mAppToken.mAppAnimator.animation != null) {
262                // When our app token is animating, we kind-of pretend like
263                // we are as well.  Note the mLocalAnimating mAnimationIsEntrance
264                // part of this check means that we will only do this if
265                // our window is not currently exiting, or it is not
266                // locally animating itself.  The idea being that one that
267                // is exiting and doing a local animation should be removed
268                // once that animation is done.
269                mAnimating = true;
270                mHasTransformation = true;
271                mTransformation.clear();
272                return false;
273            } else if (mHasTransformation) {
274                // Little trick to get through the path below to act like
275                // we have finished an animation.
276                mAnimating = true;
277            } else if (isAnimating()) {
278                mAnimating = true;
279            }
280        } else if (mAnimation != null) {
281            // If the display is frozen, and there is a pending animation,
282            // clear it and make sure we run the cleanup code.
283            mAnimating = true;
284        }
285
286        if (!mAnimating && !mLocalAnimating) {
287            return false;
288        }
289
290        // Done animating, clean up.
291        if (DEBUG_ANIM) Slog.v(
292            TAG, "Animation done in " + this + ": exiting=" + mWin.mExiting
293            + ", reportedVisible="
294            + (mWin.mAppToken != null ? mWin.mAppToken.reportedVisible : false));
295
296        mAnimating = false;
297        mLocalAnimating = false;
298        if (mAnimation != null) {
299            mAnimation.cancel();
300            mAnimation = null;
301        }
302        if (mAnimator.mWindowDetachedWallpaper == mWin) {
303            mAnimator.mWindowDetachedWallpaper = null;
304        }
305        mAnimLayer = mWin.mLayer;
306        if (mWin.mIsImWindow) {
307            mAnimLayer += mService.mInputMethodAnimLayerAdjustment;
308        } else if (mWin.mIsWallpaper) {
309            mAnimLayer += mService.mWallpaperAnimLayerAdjustment;
310        }
311        if (DEBUG_LAYERS) Slog.v(TAG, "Stepping win " + this
312                + " anim layer: " + mAnimLayer);
313        mHasTransformation = false;
314        mHasLocalTransformation = false;
315        if (mWin.mPolicyVisibility != mWin.mPolicyVisibilityAfterAnim) {
316            if (WindowState.DEBUG_VISIBILITY) {
317                Slog.v(TAG, "Policy visibility changing after anim in " + this + ": "
318                        + mWin.mPolicyVisibilityAfterAnim);
319            }
320            mWin.mPolicyVisibility = mWin.mPolicyVisibilityAfterAnim;
321            mService.mLayoutNeeded = true;
322            if (!mWin.mPolicyVisibility) {
323                if (mService.mCurrentFocus == mWin) {
324                    mService.mFocusMayChange = true;
325                }
326                // Window is no longer visible -- make sure if we were waiting
327                // for it to be displayed before enabling the display, that
328                // we allow the display to be enabled now.
329                mService.enableScreenIfNeededLocked();
330            }
331        }
332        mTransformation.clear();
333        if (mDrawState == HAS_DRAWN
334                && mWin.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING
335                && mWin.mAppToken != null
336                && mWin.mAppToken.firstWindowDrawn
337                && mWin.mAppToken.startingData != null) {
338            if (DEBUG_STARTING_WINDOW) Slog.v(TAG, "Finish starting "
339                    + mWin.mToken + ": first real window done animating");
340            mService.mFinishedStarting.add(mWin.mAppToken);
341            mService.mH.sendEmptyMessage(H.FINISHED_STARTING);
342        }
343
344        finishExit();
345        mAnimator.mPendingLayoutChanges |= WindowManagerPolicy.FINISH_LAYOUT_REDO_ANIM;
346        if (WindowManagerService.DEBUG_LAYOUT_REPEATS) mService.debugLayoutRepeats(
347                "WindowStateAnimator", mAnimator.mPendingLayoutChanges);
348
349        if (mWin.mAppToken != null) {
350            mWin.mAppToken.updateReportedVisibilityLocked();
351        }
352
353        return false;
354    }
355
356    void finishExit() {
357        if (WindowManagerService.DEBUG_ANIM) Slog.v(
358                TAG, "finishExit in " + this
359                + ": exiting=" + mWin.mExiting
360                + " remove=" + mWin.mRemoveOnExit
361                + " windowAnimating=" + isWindowAnimating());
362
363        final int N = mWin.mChildWindows.size();
364        for (int i=0; i<N; i++) {
365            mWin.mChildWindows.get(i).mWinAnimator.finishExit();
366        }
367
368        if (!mWin.mExiting) {
369            return;
370        }
371
372        if (isWindowAnimating()) {
373            return;
374        }
375
376        if (WindowManagerService.localLOGV) Slog.v(
377                TAG, "Exit animation finished in " + this
378                + ": remove=" + mWin.mRemoveOnExit);
379        if (mSurface != null) {
380            mService.mDestroySurface.add(mWin);
381            mWin.mDestroying = true;
382            if (WindowState.SHOW_TRANSACTIONS) WindowManagerService.logSurface(
383                mWin, "HIDE (finishExit)", null);
384            hide();
385        }
386        mWin.mExiting = false;
387        if (mWin.mRemoveOnExit) {
388            mService.mPendingRemove.add(mWin);
389            mWin.mRemoveOnExit = false;
390        }
391        mAnimator.hideWallpapersLocked(mWin);
392    }
393
394    void hide() {
395        if (!mLastHidden) {
396            //dump();
397            mLastHidden = true;
398            if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin,
399                    "HIDE (performLayout)", null);
400            if (mSurface != null) {
401                mSurfaceShown = false;
402                try {
403                    mSurface.hide();
404                } catch (RuntimeException e) {
405                    Slog.w(TAG, "Exception hiding surface in " + mWin);
406                }
407            }
408        }
409    }
410
411    boolean finishDrawingLocked() {
412        if (DEBUG_STARTING_WINDOW &&
413                mWin.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING) {
414            Slog.v(TAG, "Finishing drawing window " + mWin + ": mDrawState="
415                    + drawStateToString(mDrawState));
416        }
417        if (mDrawState == DRAW_PENDING) {
418            if (DEBUG_SURFACE_TRACE || DEBUG_ANIM || SHOW_TRANSACTIONS || DEBUG_ORIENTATION)
419                Slog.v(TAG, "finishDrawingLocked: mDrawState=COMMIT_DRAW_PENDING " + this + " in "
420                        + mSurface);
421            if (DEBUG_STARTING_WINDOW &&
422                    mWin.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING) {
423                Slog.v(TAG, "Draw state now committed in " + mWin);
424            }
425            mDrawState = COMMIT_DRAW_PENDING;
426            return true;
427        }
428        return false;
429    }
430
431    // This must be called while inside a transaction.
432    boolean commitFinishDrawingLocked(long currentTime) {
433        if (DEBUG_STARTING_WINDOW &&
434                mWin.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING) {
435            Slog.i(TAG, "commitFinishDrawingLocked: " + mWin + " cur mDrawState="
436                    + drawStateToString(mDrawState));
437        }
438        if (mDrawState != COMMIT_DRAW_PENDING) {
439            return false;
440        }
441        if (DEBUG_SURFACE_TRACE || DEBUG_ANIM) {
442            Slog.i(TAG, "commitFinishDrawingLocked: mDrawState=READY_TO_SHOW " + mSurface);
443        }
444        mDrawState = READY_TO_SHOW;
445        final boolean starting = mWin.mAttrs.type == TYPE_APPLICATION_STARTING;
446        final AppWindowToken atoken = mWin.mAppToken;
447        if (atoken == null || atoken.allDrawn || starting) {
448            performShowLocked();
449        }
450        return true;
451    }
452
453    static class SurfaceTrace extends Surface {
454        private final static String SURFACE_TAG = "SurfaceTrace";
455        final static ArrayList<SurfaceTrace> sSurfaces = new ArrayList<SurfaceTrace>();
456
457        private float mSurfaceTraceAlpha = 0;
458        private int mLayer;
459        private final PointF mPosition = new PointF();
460        private final Point mSize = new Point();
461        private final Rect mWindowCrop = new Rect();
462        private boolean mShown = false;
463        private String mName = "Not named";
464
465        public SurfaceTrace(SurfaceSession s,
466                       int pid, int display, int w, int h, int format, int flags) throws
467                       OutOfResourcesException {
468            super(s, pid, display, w, h, format, flags);
469            mSize.set(w, h);
470            Slog.v(SURFACE_TAG, "ctor: " + this + ". Called by "
471                    + Debug.getCallers(3));
472        }
473
474        public SurfaceTrace(SurfaceSession s,
475                       int pid, String name, int display, int w, int h, int format, int flags)
476                   throws OutOfResourcesException {
477            super(s, pid, name, display, w, h, format, flags);
478            mName = name;
479            mSize.set(w, h);
480            Slog.v(SURFACE_TAG, "ctor: " + this + ". Called by "
481                    + Debug.getCallers(3));
482        }
483
484        @Override
485        public void setAlpha(float alpha) {
486            super.setAlpha(alpha);
487            mSurfaceTraceAlpha = alpha;
488            Slog.v(SURFACE_TAG, "setAlpha: " + this + ". Called by "
489                    + Debug.getCallers(3));
490        }
491
492        @Override
493        public void setLayer(int zorder) {
494            super.setLayer(zorder);
495            mLayer = zorder;
496            Slog.v(SURFACE_TAG, "setLayer: " + this + ". Called by "
497                    + Debug.getCallers(3));
498
499            sSurfaces.remove(this);
500            int i;
501            for (i = sSurfaces.size() - 1; i >= 0; i--) {
502                SurfaceTrace s = sSurfaces.get(i);
503                if (s.mLayer < zorder) {
504                    break;
505                }
506            }
507            sSurfaces.add(i + 1, this);
508        }
509
510        @Override
511        public void setPosition(float x, float y) {
512            super.setPosition(x, y);
513            mPosition.set(x, y);
514            Slog.v(SURFACE_TAG, "setPosition: " + this + ". Called by "
515                    + Debug.getCallers(3));
516        }
517
518        @Override
519        public void setSize(int w, int h) {
520            super.setSize(w, h);
521            mSize.set(w, h);
522            Slog.v(SURFACE_TAG, "setSize: " + this + ". Called by "
523                    + Debug.getCallers(3));
524        }
525
526        @Override
527        public void setWindowCrop(Rect crop) {
528            super.setWindowCrop(crop);
529            if (crop != null) {
530                mWindowCrop.set(crop);
531            }
532            Slog.v(SURFACE_TAG, "setWindowCrop: " + this + ". Called by "
533                    + Debug.getCallers(3));
534        }
535
536        @Override
537        public void hide() {
538            super.hide();
539            mShown = false;
540            Slog.v(SURFACE_TAG, "hide: " + this + ". Called by "
541                    + Debug.getCallers(3));
542        }
543        @Override
544        public void show() {
545            super.show();
546            mShown = true;
547            Slog.v(SURFACE_TAG, "show: " + this + ". Called by "
548                    + Debug.getCallers(3));
549        }
550
551        @Override
552        public void destroy() {
553            super.destroy();
554            Slog.v(SURFACE_TAG, "destroy: " + this + ". Called by "
555                    + Debug.getCallers(3));
556            sSurfaces.remove(this);
557        }
558
559        @Override
560        public void release() {
561            super.release();
562            Slog.v(SURFACE_TAG, "release: " + this + ". Called by "
563                    + Debug.getCallers(3));
564            sSurfaces.remove(this);
565        }
566
567        static void dumpAllSurfaces() {
568            final int N = sSurfaces.size();
569            for (int i = 0; i < N; i++) {
570                Slog.i(TAG, "SurfaceDump: " + sSurfaces.get(i));
571            }
572        }
573
574        @Override
575        public String toString() {
576            return "Surface " + Integer.toHexString(System.identityHashCode(this)) + " "
577                    + mName + ": shown=" + mShown + " layer=" + mLayer
578                    + " alpha=" + mSurfaceTraceAlpha + " " + mPosition.x + "," + mPosition.y
579                    + " " + mSize.x + "x" + mSize.y
580                    + " crop=" + mWindowCrop.toShortString();
581        }
582    }
583
584    Surface createSurfaceLocked() {
585        if (mSurface == null) {
586            if (DEBUG_ANIM || DEBUG_ORIENTATION) Slog.i(TAG,
587                    "createSurface " + this + ": mDrawState=DRAW_PENDING");
588            mDrawState = DRAW_PENDING;
589            if (mWin.mAppToken != null) {
590                mWin.mAppToken.allDrawn = false;
591            }
592
593            mService.makeWindowFreezingScreenIfNeededLocked(mWin);
594
595            int flags = 0;
596            final WindowManager.LayoutParams attrs = mWin.mAttrs;
597
598            if ((attrs.flags&WindowManager.LayoutParams.FLAG_SECURE) != 0) {
599                flags |= Surface.SECURE;
600            }
601            if (WindowState.DEBUG_VISIBILITY) Slog.v(
602                TAG, "Creating surface in session "
603                + mSession.mSurfaceSession + " window " + this
604                + " w=" + mWin.mCompatFrame.width()
605                + " h=" + mWin.mCompatFrame.height() + " format="
606                + attrs.format + " flags=" + flags);
607
608            int w = mWin.mCompatFrame.width();
609            int h = mWin.mCompatFrame.height();
610            if ((attrs.flags & LayoutParams.FLAG_SCALED) != 0) {
611                // for a scaled surface, we always want the requested
612                // size.
613                w = mWin.mRequestedWidth;
614                h = mWin.mRequestedHeight;
615            }
616
617            // Something is wrong and SurfaceFlinger will not like this,
618            // try to revert to sane values
619            if (w <= 0) w = 1;
620            if (h <= 0) h = 1;
621
622            mSurfaceShown = false;
623            mSurfaceLayer = 0;
624            mSurfaceAlpha = 0;
625            mSurfaceX = 0;
626            mSurfaceY = 0;
627            mSurfaceW = w;
628            mSurfaceH = h;
629            mWin.mLastSystemDecorRect.set(0, 0, 0, 0);
630            try {
631                final boolean isHwAccelerated = (attrs.flags &
632                        WindowManager.LayoutParams.FLAG_HARDWARE_ACCELERATED) != 0;
633                final int format = isHwAccelerated ? PixelFormat.TRANSLUCENT : attrs.format;
634                if (!PixelFormat.formatHasAlpha(attrs.format)) {
635                    flags |= Surface.OPAQUE;
636                }
637                if (DEBUG_SURFACE_TRACE) {
638                    mSurface = new SurfaceTrace(
639                            mSession.mSurfaceSession, mSession.mPid,
640                            attrs.getTitle().toString(),
641                            0, w, h, format, flags);
642                } else {
643                    mSurface = new Surface(
644                        mSession.mSurfaceSession, mSession.mPid,
645                        attrs.getTitle().toString(),
646                        0, w, h, format, flags);
647                }
648                mWin.mHasSurface = true;
649                if (SHOW_TRANSACTIONS || SHOW_SURFACE_ALLOC) Slog.i(TAG,
650                        "  CREATE SURFACE "
651                        + mSurface + " IN SESSION "
652                        + mSession.mSurfaceSession
653                        + ": pid=" + mSession.mPid + " format="
654                        + attrs.format + " flags=0x"
655                        + Integer.toHexString(flags)
656                        + " / " + this);
657            } catch (Surface.OutOfResourcesException e) {
658                mWin.mHasSurface = false;
659                Slog.w(TAG, "OutOfResourcesException creating surface");
660                mService.reclaimSomeSurfaceMemoryLocked(this, "create", true);
661                mDrawState = NO_SURFACE;
662                return null;
663            } catch (Exception e) {
664                mWin.mHasSurface = false;
665                Slog.e(TAG, "Exception creating surface", e);
666                mDrawState = NO_SURFACE;
667                return null;
668            }
669
670            if (WindowManagerService.localLOGV) Slog.v(
671                TAG, "Got surface: " + mSurface
672                + ", set left=" + mWin.mFrame.left + " top=" + mWin.mFrame.top
673                + ", animLayer=" + mAnimLayer);
674            if (SHOW_LIGHT_TRANSACTIONS) {
675                Slog.i(TAG, ">>> OPEN TRANSACTION createSurfaceLocked");
676                WindowManagerService.logSurface(mWin, "CREATE pos=("
677                        + mWin.mFrame.left + "," + mWin.mFrame.top + ") ("
678                        + mWin.mCompatFrame.width() + "x" + mWin.mCompatFrame.height()
679                        + "), layer=" + mAnimLayer + " HIDE", null);
680            }
681            Surface.openTransaction();
682            try {
683                try {
684                    mSurfaceX = mWin.mFrame.left + mWin.mXOffset;
685                    mSurfaceY = mWin.mFrame.top + mWin.mYOffset;
686                    mSurface.setPosition(mSurfaceX, mSurfaceY);
687                    mSurfaceLayer = mAnimLayer;
688                    mSurface.setLayer(mAnimLayer);
689                    mSurface.setAlpha(0);
690                    mSurfaceShown = false;
691                    mSurface.hide();
692                    if ((mWin.mAttrs.flags&WindowManager.LayoutParams.FLAG_DITHER) != 0) {
693                        if (SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin, "DITHER", null);
694                        mSurface.setFlags(Surface.SURFACE_DITHER, Surface.SURFACE_DITHER);
695                    }
696                } catch (RuntimeException e) {
697                    Slog.w(TAG, "Error creating surface in " + w, e);
698                    mService.reclaimSomeSurfaceMemoryLocked(this, "create-init", true);
699                }
700                mLastHidden = true;
701            } finally {
702                Surface.closeTransaction();
703                if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
704                        "<<< CLOSE TRANSACTION createSurfaceLocked");
705            }
706            if (WindowManagerService.localLOGV) Slog.v(
707                    TAG, "Created surface " + this);
708        }
709        return mSurface;
710    }
711
712    void destroySurfaceLocked() {
713        if (mWin.mAppToken != null && mWin == mWin.mAppToken.startingWindow) {
714            mWin.mAppToken.startingDisplayed = false;
715        }
716
717        if (mSurface != null) {
718
719            int i = mWin.mChildWindows.size();
720            while (i > 0) {
721                i--;
722                WindowState c = mWin.mChildWindows.get(i);
723                c.mAttachedHidden = true;
724            }
725
726            try {
727                if (DEBUG_VISIBILITY) {
728                    RuntimeException e = null;
729                    if (!WindowManagerService.HIDE_STACK_CRAWLS) {
730                        e = new RuntimeException();
731                        e.fillInStackTrace();
732                    }
733                    Slog.w(TAG, "Window " + this + " destroying surface "
734                            + mSurface + ", session " + mSession, e);
735                }
736                if (mSurfaceDestroyDeferred) {
737                    if (mSurface != null && mPendingDestroySurface != mSurface) {
738                        if (mPendingDestroySurface != null) {
739                            if (SHOW_TRANSACTIONS || SHOW_SURFACE_ALLOC) {
740                                RuntimeException e = null;
741                                if (!WindowManagerService.HIDE_STACK_CRAWLS) {
742                                    e = new RuntimeException();
743                                    e.fillInStackTrace();
744                                }
745                                WindowManagerService.logSurface(mWin, "DESTROY PENDING", e);
746                            }
747                            mPendingDestroySurface.destroy();
748                        }
749                        mPendingDestroySurface = mSurface;
750                    }
751                } else {
752                    if (SHOW_TRANSACTIONS || SHOW_SURFACE_ALLOC) {
753                        RuntimeException e = null;
754                        if (!WindowManagerService.HIDE_STACK_CRAWLS) {
755                            e = new RuntimeException();
756                            e.fillInStackTrace();
757                        }
758                        WindowManagerService.logSurface(mWin, "DESTROY", e);
759                    }
760                    mSurface.destroy();
761                }
762                mAnimator.hideWallpapersLocked(mWin);
763            } catch (RuntimeException e) {
764                Slog.w(TAG, "Exception thrown when destroying Window " + this
765                    + " surface " + mSurface + " session " + mSession
766                    + ": " + e.toString());
767            }
768
769            mSurfaceShown = false;
770            mSurface = null;
771            mWin.mHasSurface =false;
772            mDrawState = NO_SURFACE;
773        }
774    }
775
776    void destroyDeferredSurfaceLocked() {
777        try {
778            if (mPendingDestroySurface != null) {
779                if (SHOW_TRANSACTIONS || SHOW_SURFACE_ALLOC) {
780                    RuntimeException e = null;
781                    if (!WindowManagerService.HIDE_STACK_CRAWLS) {
782                        e = new RuntimeException();
783                        e.fillInStackTrace();
784                    }
785                    WindowManagerService.logSurface(mWin, "DESTROY PENDING", e);
786                }
787                mPendingDestroySurface.destroy();
788                mAnimator.hideWallpapersLocked(mWin);
789            }
790        } catch (RuntimeException e) {
791            Slog.w(TAG, "Exception thrown when destroying Window "
792                    + this + " surface " + mPendingDestroySurface
793                    + " session " + mSession + ": " + e.toString());
794        }
795        mSurfaceDestroyDeferred = false;
796        mPendingDestroySurface = null;
797    }
798
799    void computeShownFrameLocked() {
800        final boolean selfTransformation = mHasLocalTransformation;
801        Transformation attachedTransformation =
802                (mAttachedWindow != null && mAttachedWindow.mWinAnimator.mHasLocalTransformation)
803                ? mAttachedWindow.mWinAnimator.mTransformation : null;
804        final AppWindowAnimator appAnimator =
805                mWin.mAppToken == null ? null : mWin.mAppToken.mAppAnimator;
806        Transformation appTransformation = (appAnimator != null && appAnimator.hasTransformation)
807                ? appAnimator.transformation : null;
808
809        // Wallpapers are animated based on the "real" window they
810        // are currently targeting.
811        if (mWin.mAttrs.type == TYPE_WALLPAPER && mService.mLowerWallpaperTarget == null
812                && mService.mWallpaperTarget != null) {
813            if (mService.mWallpaperTarget.mWinAnimator.mHasLocalTransformation &&
814                    mService.mWallpaperTarget.mWinAnimator.mAnimation != null &&
815                    !mService.mWallpaperTarget.mWinAnimator.mAnimation.getDetachWallpaper()) {
816                attachedTransformation = mService.mWallpaperTarget.mWinAnimator.mTransformation;
817                if (WindowManagerService.DEBUG_WALLPAPER && attachedTransformation != null) {
818                    Slog.v(TAG, "WP target attached xform: " + attachedTransformation);
819                }
820            }
821            final AppWindowAnimator wpAppAnimator = mService.mWallpaperTarget.mAppToken == null
822                    ? null : mService.mWallpaperTarget.mAppToken.mAppAnimator;
823            if (wpAppAnimator != null &&
824                    wpAppAnimator.hasTransformation &&
825                    wpAppAnimator.animation != null &&
826                    !wpAppAnimator.animation.getDetachWallpaper()) {
827                appTransformation = wpAppAnimator.transformation;
828                if (WindowManagerService.DEBUG_WALLPAPER && appTransformation != null) {
829                    Slog.v(TAG, "WP target app xform: " + appTransformation);
830                }
831            }
832        }
833
834        final boolean screenAnimation = mService.mAnimator.mScreenRotationAnimation != null
835                && mService.mAnimator.mScreenRotationAnimation.isAnimating();
836        if (selfTransformation || attachedTransformation != null
837                || appTransformation != null || screenAnimation) {
838            // cache often used attributes locally
839            final Rect frame = mWin.mFrame;
840            final float tmpFloats[] = mService.mTmpFloats;
841            final Matrix tmpMatrix = mWin.mTmpMatrix;
842
843            // Compute the desired transformation.
844            if (screenAnimation) {
845                // If we are doing a screen animation, the global rotation
846                // applied to windows can result in windows that are carefully
847                // aligned with each other to slightly separate, allowing you
848                // to see what is behind them.  An unsightly mess.  This...
849                // thing...  magically makes it call good: scale each window
850                // slightly (two pixels larger in each dimension, from the
851                // window's center).
852                final float w = frame.width();
853                final float h = frame.height();
854                if (w>=1 && h>=1) {
855                    tmpMatrix.setScale(1 + 2/w, 1 + 2/h, w/2, h/2);
856                } else {
857                    tmpMatrix.reset();
858                }
859            } else {
860                tmpMatrix.reset();
861            }
862            tmpMatrix.postScale(mWin.mGlobalScale, mWin.mGlobalScale);
863            if (selfTransformation) {
864                tmpMatrix.postConcat(mTransformation.getMatrix());
865            }
866            tmpMatrix.postTranslate(frame.left + mWin.mXOffset, frame.top + mWin.mYOffset);
867            if (attachedTransformation != null) {
868                tmpMatrix.postConcat(attachedTransformation.getMatrix());
869            }
870            if (appTransformation != null) {
871                tmpMatrix.postConcat(appTransformation.getMatrix());
872            }
873            if (screenAnimation) {
874                tmpMatrix.postConcat(
875                        mService.mAnimator.mScreenRotationAnimation.getEnterTransformation().getMatrix());
876            }
877
878            // "convert" it into SurfaceFlinger's format
879            // (a 2x2 matrix + an offset)
880            // Here we must not transform the position of the surface
881            // since it is already included in the transformation.
882            //Slog.i(TAG, "Transform: " + matrix);
883
884            mHaveMatrix = true;
885            tmpMatrix.getValues(tmpFloats);
886            mDsDx = tmpFloats[Matrix.MSCALE_X];
887            mDtDx = tmpFloats[Matrix.MSKEW_Y];
888            mDsDy = tmpFloats[Matrix.MSKEW_X];
889            mDtDy = tmpFloats[Matrix.MSCALE_Y];
890            float x = tmpFloats[Matrix.MTRANS_X];
891            float y = tmpFloats[Matrix.MTRANS_Y];
892            int w = frame.width();
893            int h = frame.height();
894            mWin.mShownFrame.set(x, y, x+w, y+h);
895
896            // Now set the alpha...  but because our current hardware
897            // can't do alpha transformation on a non-opaque surface,
898            // turn it off if we are running an animation that is also
899            // transforming since it is more important to have that
900            // animation be smooth.
901            mShownAlpha = mAlpha;
902            if (!mService.mLimitedAlphaCompositing
903                    || (!PixelFormat.formatHasAlpha(mWin.mAttrs.format)
904                    || (mWin.isIdentityMatrix(mDsDx, mDtDx, mDsDy, mDtDy)
905                            && x == frame.left && y == frame.top))) {
906                //Slog.i(TAG, "Applying alpha transform");
907                if (selfTransformation) {
908                    mShownAlpha *= mTransformation.getAlpha();
909                }
910                if (attachedTransformation != null) {
911                    mShownAlpha *= attachedTransformation.getAlpha();
912                }
913                if (appTransformation != null) {
914                    mShownAlpha *= appTransformation.getAlpha();
915                }
916                if (screenAnimation) {
917                    mShownAlpha *=
918                        mService.mAnimator.mScreenRotationAnimation.getEnterTransformation().getAlpha();
919                }
920            } else {
921                //Slog.i(TAG, "Not applying alpha transform");
922            }
923
924            if (WindowManagerService.localLOGV && (mShownAlpha == 1.0 || mShownAlpha == 0.0)) Slog.v(
925                TAG, "computeShownFrameLocked: Animating " + this +
926                " mAlpha=" + mAlpha +
927                " self=" + (selfTransformation ? mTransformation.getAlpha() : "null") +
928                " attached=" + (attachedTransformation == null ? "null" : attachedTransformation.getAlpha()) +
929                " app=" + (appTransformation == null ? "null" : appTransformation.getAlpha()) +
930                " screen=" + (screenAnimation ? mService.mAnimator.mScreenRotationAnimation.getEnterTransformation().getAlpha()
931                        : "null"));
932            return;
933        } else if (mWin.mIsWallpaper &&
934                    (mAnimator.mPendingActions & WindowAnimator.WALLPAPER_ACTION_PENDING) != 0) {
935            return;
936        }
937
938        if (WindowManagerService.localLOGV) Slog.v(
939                TAG, "computeShownFrameLocked: " + this +
940                " not attached, mAlpha=" + mAlpha);
941        mWin.mShownFrame.set(mWin.mFrame);
942        if (mWin.mXOffset != 0 || mWin.mYOffset != 0) {
943            mWin.mShownFrame.offset(mWin.mXOffset, mWin.mYOffset);
944        }
945        mShownAlpha = mAlpha;
946        mHaveMatrix = false;
947        mDsDx = mWin.mGlobalScale;
948        mDtDx = 0;
949        mDsDy = 0;
950        mDtDy = mWin.mGlobalScale;
951    }
952
953    void updateSurfaceWindowCrop(final boolean recoveringMemory) {
954        final WindowState w = mWin;
955
956        // Need to recompute a new system decor rect each time.
957        if ((w.mAttrs.flags & LayoutParams.FLAG_SCALED) != 0) {
958            // Currently can't do this cropping for scaled windows.  We'll
959            // just keep the crop rect the same as the source surface.
960            w.mSystemDecorRect.set(0, 0, w.mRequestedWidth, w.mRequestedHeight);
961        } else if (w.mLayer >= mService.mSystemDecorLayer) {
962            // Above the decor layer is easy, just use the entire window.
963            w.mSystemDecorRect.set(0, 0, w.mCompatFrame.width(),
964                    w.mCompatFrame.height());
965        } else {
966            final Rect decorRect = mService.mSystemDecorRect;
967            // Compute the offset of the window in relation to the decor rect.
968            final int offX = w.mXOffset + w.mFrame.left;
969            final int offY = w.mYOffset + w.mFrame.top;
970            // Initialize the decor rect to the entire frame.
971            w.mSystemDecorRect.set(0, 0, w.mFrame.width(), w.mFrame.height());
972            // Intersect with the decor rect, offsetted by window position.
973            w.mSystemDecorRect.intersect(decorRect.left-offX, decorRect.top-offY,
974                    decorRect.right-offX, decorRect.bottom-offY);
975            // If size compatibility is being applied to the window, the
976            // surface is scaled relative to the screen.  Also apply this
977            // scaling to the crop rect.  We aren't using the standard rect
978            // scale function because we want to round things to make the crop
979            // always round to a larger rect to ensure we don't crop too
980            // much and hide part of the window that should be seen.
981            if (w.mEnforceSizeCompat && w.mInvGlobalScale != 1.0f) {
982                final float scale = w.mInvGlobalScale;
983                w.mSystemDecorRect.left = (int) (w.mSystemDecorRect.left * scale - 0.5f);
984                w.mSystemDecorRect.top = (int) (w.mSystemDecorRect.top * scale - 0.5f);
985                w.mSystemDecorRect.right = (int) ((w.mSystemDecorRect.right+1) * scale - 0.5f);
986                w.mSystemDecorRect.bottom = (int) ((w.mSystemDecorRect.bottom+1) * scale - 0.5f);
987            }
988        }
989
990        if (!w.mSystemDecorRect.equals(w.mLastSystemDecorRect)) {
991            w.mLastSystemDecorRect.set(w.mSystemDecorRect);
992            try {
993                if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(w,
994                        "CROP " + w.mSystemDecorRect.toShortString(), null);
995                mSurface.setWindowCrop(w.mSystemDecorRect);
996            } catch (RuntimeException e) {
997                Slog.w(TAG, "Error setting crop surface of " + w
998                        + " crop=" + w.mSystemDecorRect.toShortString(), e);
999                if (!recoveringMemory) {
1000                    mService.reclaimSomeSurfaceMemoryLocked(this, "crop", true);
1001                }
1002            }
1003        }
1004    }
1005
1006    void setSurfaceBoundaries(final boolean recoveringMemory) {
1007        final WindowState w = mWin;
1008        int width, height;
1009        if ((w.mAttrs.flags & LayoutParams.FLAG_SCALED) != 0) {
1010            // for a scaled surface, we just want to use
1011            // the requested size.
1012            width  = w.mRequestedWidth;
1013            height = w.mRequestedHeight;
1014        } else {
1015            width = w.mCompatFrame.width();
1016            height = w.mCompatFrame.height();
1017        }
1018
1019        if (width < 1) {
1020            width = 1;
1021        }
1022        if (height < 1) {
1023            height = 1;
1024        }
1025        final boolean surfaceResized = mSurfaceW != width || mSurfaceH != height;
1026        if (surfaceResized) {
1027            mSurfaceW = width;
1028            mSurfaceH = height;
1029        }
1030
1031        final float left = w.mShownFrame.left;
1032        final float top = w.mShownFrame.top;
1033        if (mSurfaceX != left || mSurfaceY != top) {
1034            try {
1035                if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(w,
1036                        "POS " + left + ", " + top, null);
1037                mSurfaceX = left;
1038                mSurfaceY = top;
1039                mSurface.setPosition(left, top);
1040            } catch (RuntimeException e) {
1041                Slog.w(TAG, "Error positioning surface of " + w
1042                        + " pos=(" + left
1043                        + "," + top + ")", e);
1044                if (!recoveringMemory) {
1045                    mService.reclaimSomeSurfaceMemoryLocked(this, "position", true);
1046                }
1047            }
1048        }
1049
1050        if (surfaceResized) {
1051            try {
1052                if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(w,
1053                        "SIZE " + width + "x" + height, null);
1054                mSurfaceResized = true;
1055                mSurface.setSize(width, height);
1056                mAnimator.mPendingLayoutChanges |=
1057                        WindowManagerPolicy.FINISH_LAYOUT_REDO_WALLPAPER;
1058                if ((w.mAttrs.flags & LayoutParams.FLAG_DIM_BEHIND) != 0) {
1059                    mAnimator.startDimming(this, w.mExiting ? 0 : w.mAttrs.dimAmount,
1060                            mService.mAppDisplayWidth, mService.mAppDisplayHeight);
1061                }
1062            } catch (RuntimeException e) {
1063                // If something goes wrong with the surface (such
1064                // as running out of memory), don't take down the
1065                // entire system.
1066                Slog.e(TAG, "Error resizing surface of " + w
1067                        + " size=(" + width + "x" + height + ")", e);
1068                if (!recoveringMemory) {
1069                    mService.reclaimSomeSurfaceMemoryLocked(this, "size", true);
1070                }
1071            }
1072        }
1073
1074        updateSurfaceWindowCrop(recoveringMemory);
1075    }
1076
1077    public void prepareSurfaceLocked(final boolean recoveringMemory) {
1078        final WindowState w = mWin;
1079        if (mSurface == null) {
1080            if (w.mOrientationChanging) {
1081                if (DEBUG_ORIENTATION) {
1082                    Slog.v(TAG, "Orientation change skips hidden " + w);
1083                }
1084                w.mOrientationChanging = false;
1085            }
1086            return;
1087        }
1088
1089        boolean displayed = false;
1090
1091        computeShownFrameLocked();
1092
1093        setSurfaceBoundaries(recoveringMemory);
1094
1095        if (mWin.mIsWallpaper && !mWin.mWallpaperVisible) {
1096            // Wallpaper is no longer visible and there is no wp target => hide it.
1097            hide();
1098        } else if (w.mAttachedHidden || !w.isReadyForDisplay()) {
1099            hide();
1100            mAnimator.hideWallpapersLocked(w);
1101
1102            // If we are waiting for this window to handle an
1103            // orientation change, well, it is hidden, so
1104            // doesn't really matter.  Note that this does
1105            // introduce a potential glitch if the window
1106            // becomes unhidden before it has drawn for the
1107            // new orientation.
1108            if (w.mOrientationChanging) {
1109                w.mOrientationChanging = false;
1110                if (DEBUG_ORIENTATION) Slog.v(TAG,
1111                        "Orientation change skips hidden " + w);
1112            }
1113        } else if (mLastLayer != mAnimLayer
1114                || mLastAlpha != mShownAlpha
1115                || mLastDsDx != mDsDx
1116                || mLastDtDx != mDtDx
1117                || mLastDsDy != mDsDy
1118                || mLastDtDy != mDtDy
1119                || w.mLastHScale != w.mHScale
1120                || w.mLastVScale != w.mVScale
1121                || mLastHidden) {
1122            displayed = true;
1123            mLastAlpha = mShownAlpha;
1124            mLastLayer = mAnimLayer;
1125            mLastDsDx = mDsDx;
1126            mLastDtDx = mDtDx;
1127            mLastDsDy = mDsDy;
1128            mLastDtDy = mDtDy;
1129            w.mLastHScale = w.mHScale;
1130            w.mLastVScale = w.mVScale;
1131            if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(w,
1132                    "alpha=" + mShownAlpha + " layer=" + mAnimLayer
1133                    + " matrix=[" + (mDsDx*w.mHScale)
1134                    + "," + (mDtDx*w.mVScale)
1135                    + "][" + (mDsDy*w.mHScale)
1136                    + "," + (mDtDy*w.mVScale) + "]", null);
1137            if (mSurface != null) {
1138                try {
1139                    mSurfaceAlpha = mShownAlpha;
1140                    mSurface.setAlpha(mShownAlpha);
1141                    mSurfaceLayer = mAnimLayer;
1142                    mSurface.setLayer(mAnimLayer);
1143                    mSurface.setMatrix(
1144                        mDsDx*w.mHScale, mDtDx*w.mVScale,
1145                        mDsDy*w.mHScale, mDtDy*w.mVScale);
1146
1147                    if (mLastHidden && mDrawState == HAS_DRAWN) {
1148                        if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(w,
1149                                "SHOW (performLayout)", null);
1150                        if (WindowManagerService.DEBUG_VISIBILITY) Slog.v(TAG, "Showing " + w
1151                                + " during relayout");
1152                        if (showSurfaceRobustlyLocked()) {
1153                            mLastHidden = false;
1154                            if (w.mIsWallpaper) {
1155                                mService.dispatchWallpaperVisibility(w, true);
1156                            }
1157                        } else {
1158                            w.mOrientationChanging = false;
1159                        }
1160                    }
1161                    if (mSurface != null) {
1162                        w.mToken.hasVisible = true;
1163                    }
1164                } catch (RuntimeException e) {
1165                    Slog.w(TAG, "Error updating surface in " + w, e);
1166                    if (!recoveringMemory) {
1167                        mService.reclaimSomeSurfaceMemoryLocked(this, "update", true);
1168                    }
1169                }
1170            }
1171        } else {
1172            if (DEBUG_ANIM) {
1173                // Slog.v(TAG, "prepareSurface: No changes in animation for " + mWin);
1174            }
1175            displayed = true;
1176        }
1177
1178        if (displayed) {
1179            if (w.mOrientationChanging) {
1180                if (!w.isDrawnLw()) {
1181                    mAnimator.mBulkUpdateParams |= CLEAR_ORIENTATION_CHANGE_COMPLETE;
1182                    if (DEBUG_ORIENTATION) Slog.v(TAG,
1183                            "Orientation continue waiting for draw in " + w);
1184                } else {
1185                    w.mOrientationChanging = false;
1186                    if (DEBUG_ORIENTATION) Slog.v(TAG, "Orientation change complete in " + w);
1187                }
1188            }
1189            w.mToken.hasVisible = true;
1190        }
1191    }
1192
1193    void setTransparentRegionHint(final Region region) {
1194        if (mSurface == null) {
1195            Slog.w(TAG, "setTransparentRegionHint: null mSurface after mHasSurface true");
1196            return;
1197        }
1198        if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
1199            ">>> OPEN TRANSACTION setTransparentRegion");
1200        Surface.openTransaction();
1201        try {
1202            if (SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin,
1203                    "transparentRegionHint=" + region, null);
1204            mSurface.setTransparentRegionHint(region);
1205        } finally {
1206            Surface.closeTransaction();
1207            if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
1208                    "<<< CLOSE TRANSACTION setTransparentRegion");
1209        }
1210    }
1211
1212    void setWallpaperOffset(int left, int top) {
1213        mSurfaceX = left;
1214        mSurfaceY = top;
1215        if (mAnimating) {
1216            // If this window (or its app token) is animating, then the position
1217            // of the surface will be re-computed on the next animation frame.
1218            // We can't poke it directly here because it depends on whatever
1219            // transformation is being applied by the animation.
1220            return;
1221        }
1222        if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
1223                ">>> OPEN TRANSACTION setWallpaperOffset");
1224        Surface.openTransaction();
1225        try {
1226            if (WindowManagerService.SHOW_TRANSACTIONS) WindowManagerService.logSurface(mWin,
1227                    "POS " + left + ", " + top, null);
1228            mSurface.setPosition(mWin.mFrame.left + left, mWin.mFrame.top + top);
1229            updateSurfaceWindowCrop(false);
1230        } catch (RuntimeException e) {
1231            Slog.w(TAG, "Error positioning surface of " + mWin
1232                    + " pos=(" + left + "," + top + ")", e);
1233        } finally {
1234            Surface.closeTransaction();
1235            if (SHOW_LIGHT_TRANSACTIONS) Slog.i(TAG,
1236                    "<<< CLOSE TRANSACTION setWallpaperOffset");
1237        }
1238    }
1239
1240    // This must be called while inside a transaction.
1241    boolean performShowLocked() {
1242        if (DEBUG_VISIBILITY || (DEBUG_STARTING_WINDOW &&
1243                mWin.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING)) {
1244            RuntimeException e = null;
1245            if (!WindowManagerService.HIDE_STACK_CRAWLS) {
1246                e = new RuntimeException();
1247                e.fillInStackTrace();
1248            }
1249            Slog.v(TAG, "performShow on " + this
1250                    + ": mDrawState=" + mDrawState + " readyForDisplay="
1251                    + mWin.isReadyForDisplayIgnoringKeyguard()
1252                    + " starting=" + (mWin.mAttrs.type == TYPE_APPLICATION_STARTING)
1253                    + " during animation: policyVis=" + mWin.mPolicyVisibility
1254                    + " attHidden=" + mWin.mAttachedHidden
1255                    + " tok.hiddenRequested="
1256                    + (mWin.mAppToken != null ? mWin.mAppToken.hiddenRequested : false)
1257                    + " tok.hidden="
1258                    + (mWin.mAppToken != null ? mWin.mAppToken.hidden : false)
1259                    + " animating=" + mAnimating
1260                    + " tok animating="
1261                    + (mWin.mAppToken != null ? mWin.mAppToken.mAppAnimator.animating : false), e);
1262        }
1263        if (mDrawState == READY_TO_SHOW && mWin.isReadyForDisplayIgnoringKeyguard()) {
1264            if (SHOW_TRANSACTIONS || DEBUG_ORIENTATION)
1265                WindowManagerService.logSurface(mWin, "SHOW (performShowLocked)", null);
1266            if (DEBUG_VISIBILITY || (DEBUG_STARTING_WINDOW &&
1267                    mWin.mAttrs.type == WindowManager.LayoutParams.TYPE_APPLICATION_STARTING)) {
1268                Slog.v(TAG, "Showing " + this
1269                        + " during animation: policyVis=" + mWin.mPolicyVisibility
1270                        + " attHidden=" + mWin.mAttachedHidden
1271                        + " tok.hiddenRequested="
1272                        + (mWin.mAppToken != null ? mWin.mAppToken.hiddenRequested : false)
1273                        + " tok.hidden="
1274                        + (mWin.mAppToken != null ? mWin.mAppToken.hidden : false)
1275                        + " animating=" + mAnimating
1276                        + " tok animating="
1277                        + (mWin.mAppToken != null ? mWin.mAppToken.mAppAnimator.animating : false));
1278            }
1279
1280            mService.enableScreenIfNeededLocked();
1281
1282            applyEnterAnimationLocked();
1283
1284            // Force the show in the next prepareSurfaceLocked() call.
1285            mLastAlpha = -1;
1286            if (DEBUG_SURFACE_TRACE || DEBUG_ANIM)
1287                Slog.v(TAG, "performShowLocked: mDrawState=HAS_DRAWN in " + this);
1288            mDrawState = HAS_DRAWN;
1289            mService.scheduleAnimationLocked();
1290
1291            int i = mWin.mChildWindows.size();
1292            while (i > 0) {
1293                i--;
1294                WindowState c = mWin.mChildWindows.get(i);
1295                if (c.mAttachedHidden) {
1296                    c.mAttachedHidden = false;
1297                    if (c.mWinAnimator.mSurface != null) {
1298                        c.mWinAnimator.performShowLocked();
1299                        // It hadn't been shown, which means layout not
1300                        // performed on it, so now we want to make sure to
1301                        // do a layout.  If called from within the transaction
1302                        // loop, this will cause it to restart with a new
1303                        // layout.
1304                        mService.mLayoutNeeded = true;
1305                    }
1306                }
1307            }
1308
1309            if (mWin.mAttrs.type != TYPE_APPLICATION_STARTING
1310                    && mWin.mAppToken != null) {
1311                mWin.mAppToken.firstWindowDrawn = true;
1312
1313                if (mWin.mAppToken.startingData != null) {
1314                    if (WindowManagerService.DEBUG_STARTING_WINDOW ||
1315                            WindowManagerService.DEBUG_ANIM) Slog.v(TAG,
1316                            "Finish starting " + mWin.mToken
1317                            + ": first real window is shown, no animation");
1318                    // If this initial window is animating, stop it -- we
1319                    // will do an animation to reveal it from behind the
1320                    // starting window, so there is no need for it to also
1321                    // be doing its own stuff.
1322                    clearAnimation();
1323                    mService.mFinishedStarting.add(mWin.mAppToken);
1324                    mService.mH.sendEmptyMessage(H.FINISHED_STARTING);
1325                }
1326                mWin.mAppToken.updateReportedVisibilityLocked();
1327            }
1328
1329            return true;
1330        }
1331
1332        return false;
1333    }
1334
1335    /**
1336     * Have the surface flinger show a surface, robustly dealing with
1337     * error conditions.  In particular, if there is not enough memory
1338     * to show the surface, then we will try to get rid of other surfaces
1339     * in order to succeed.
1340     *
1341     * @return Returns true if the surface was successfully shown.
1342     */
1343    boolean showSurfaceRobustlyLocked() {
1344        try {
1345            if (mSurface != null) {
1346                mSurfaceShown = true;
1347                mSurface.show();
1348                if (mWin.mTurnOnScreen) {
1349                    if (DEBUG_VISIBILITY) Slog.v(TAG,
1350                            "Show surface turning screen on: " + mWin);
1351                    mWin.mTurnOnScreen = false;
1352                    mAnimator.mBulkUpdateParams |= SET_TURN_ON_SCREEN;
1353                }
1354            }
1355            return true;
1356        } catch (RuntimeException e) {
1357            Slog.w(TAG, "Failure showing surface " + mSurface + " in " + mWin, e);
1358        }
1359
1360        mService.reclaimSomeSurfaceMemoryLocked(this, "show", true);
1361
1362        return false;
1363    }
1364
1365    void applyEnterAnimationLocked() {
1366        final int transit;
1367        if (mEnterAnimationPending) {
1368            mEnterAnimationPending = false;
1369            transit = WindowManagerPolicy.TRANSIT_ENTER;
1370        } else {
1371            transit = WindowManagerPolicy.TRANSIT_SHOW;
1372        }
1373
1374        applyAnimationLocked(transit, true);
1375    }
1376
1377    // TODO(cmautner): Move back to WindowState?
1378    /**
1379     * Choose the correct animation and set it to the passed WindowState.
1380     * @param transit If WindowManagerPolicy.TRANSIT_PREVIEW_DONE and the app window has been drawn
1381     *      then the animation will be app_starting_exit. Any other value loads the animation from
1382     *      the switch statement below.
1383     * @param isEntrance The animation type the last time this was called. Used to keep from
1384     *      loading the same animation twice.
1385     * @return true if an animation has been loaded.
1386     */
1387    boolean applyAnimationLocked(int transit, boolean isEntrance) {
1388        if (mLocalAnimating && mAnimationIsEntrance == isEntrance) {
1389            // If we are trying to apply an animation, but already running
1390            // an animation of the same type, then just leave that one alone.
1391            return true;
1392        }
1393
1394        // Only apply an animation if the display isn't frozen.  If it is
1395        // frozen, there is no reason to animate and it can cause strange
1396        // artifacts when we unfreeze the display if some different animation
1397        // is running.
1398        if (mService.okToDisplay()) {
1399            int anim = mPolicy.selectAnimationLw(mWin, transit);
1400            int attr = -1;
1401            Animation a = null;
1402            if (anim != 0) {
1403                a = AnimationUtils.loadAnimation(mContext, anim);
1404            } else {
1405                switch (transit) {
1406                    case WindowManagerPolicy.TRANSIT_ENTER:
1407                        attr = com.android.internal.R.styleable.WindowAnimation_windowEnterAnimation;
1408                        break;
1409                    case WindowManagerPolicy.TRANSIT_EXIT:
1410                        attr = com.android.internal.R.styleable.WindowAnimation_windowExitAnimation;
1411                        break;
1412                    case WindowManagerPolicy.TRANSIT_SHOW:
1413                        attr = com.android.internal.R.styleable.WindowAnimation_windowShowAnimation;
1414                        break;
1415                    case WindowManagerPolicy.TRANSIT_HIDE:
1416                        attr = com.android.internal.R.styleable.WindowAnimation_windowHideAnimation;
1417                        break;
1418                }
1419                if (attr >= 0) {
1420                    a = mService.loadAnimation(mWin.mAttrs, attr);
1421                }
1422            }
1423            if (WindowManagerService.DEBUG_ANIM) Slog.v(TAG,
1424                    "applyAnimation: win=" + this
1425                    + " anim=" + anim + " attr=0x" + Integer.toHexString(attr)
1426                    + " a=" + a
1427                    + " mAnimation=" + mAnimation
1428                    + " isEntrance=" + isEntrance + " Callers " + Debug.getCallers(3));
1429            if (a != null) {
1430                if (WindowManagerService.DEBUG_ANIM) {
1431                    RuntimeException e = null;
1432                    if (!WindowManagerService.HIDE_STACK_CRAWLS) {
1433                        e = new RuntimeException();
1434                        e.fillInStackTrace();
1435                    }
1436                    Slog.v(TAG, "Loaded animation " + a + " for " + this, e);
1437                }
1438                setAnimation(a);
1439                mAnimationIsEntrance = isEntrance;
1440            }
1441        } else {
1442            clearAnimation();
1443        }
1444
1445        return mAnimation != null;
1446    }
1447
1448    public void dump(PrintWriter pw, String prefix, boolean dumpAll) {
1449        if (mAnimating || mLocalAnimating || mAnimationIsEntrance
1450                || mAnimation != null) {
1451            pw.print(prefix); pw.print("mAnimating="); pw.print(mAnimating);
1452                    pw.print(" mLocalAnimating="); pw.print(mLocalAnimating);
1453                    pw.print(" mAnimationIsEntrance="); pw.print(mAnimationIsEntrance);
1454                    pw.print(" mAnimation="); pw.println(mAnimation);
1455        }
1456        if (mHasTransformation || mHasLocalTransformation) {
1457            pw.print(prefix); pw.print("XForm: has=");
1458                    pw.print(mHasTransformation);
1459                    pw.print(" hasLocal="); pw.print(mHasLocalTransformation);
1460                    pw.print(" "); mTransformation.printShortString(pw);
1461                    pw.println();
1462        }
1463        if (mSurface != null) {
1464            if (dumpAll) {
1465                pw.print(prefix); pw.print("mSurface="); pw.println(mSurface);
1466                pw.print(prefix); pw.print("mDrawState=");
1467                pw.print(drawStateToString(mDrawState));
1468                pw.print(" mLastHidden="); pw.println(mLastHidden);
1469            }
1470            pw.print(prefix); pw.print("Surface: shown="); pw.print(mSurfaceShown);
1471                    pw.print(" layer="); pw.print(mSurfaceLayer);
1472                    pw.print(" alpha="); pw.print(mSurfaceAlpha);
1473                    pw.print(" rect=("); pw.print(mSurfaceX);
1474                    pw.print(","); pw.print(mSurfaceY);
1475                    pw.print(") "); pw.print(mSurfaceW);
1476                    pw.print(" x "); pw.println(mSurfaceH);
1477        }
1478        if (mPendingDestroySurface != null) {
1479            pw.print(prefix); pw.print("mPendingDestroySurface=");
1480                    pw.println(mPendingDestroySurface);
1481        }
1482        if (mSurfaceResized || mSurfaceDestroyDeferred) {
1483            pw.print(prefix); pw.print("mSurfaceResized="); pw.print(mSurfaceResized);
1484                    pw.print(" mSurfaceDestroyDeferred="); pw.println(mSurfaceDestroyDeferred);
1485        }
1486        if (mShownAlpha != 1 || mAlpha != 1 || mLastAlpha != 1) {
1487            pw.print(prefix); pw.print("mShownAlpha="); pw.print(mShownAlpha);
1488                    pw.print(" mAlpha="); pw.print(mAlpha);
1489                    pw.print(" mLastAlpha="); pw.println(mLastAlpha);
1490        }
1491        if (mHaveMatrix || mWin.mGlobalScale != 1) {
1492            pw.print(prefix); pw.print("mGlobalScale="); pw.print(mWin.mGlobalScale);
1493                    pw.print(" mDsDx="); pw.print(mDsDx);
1494                    pw.print(" mDtDx="); pw.print(mDtDx);
1495                    pw.print(" mDsDy="); pw.print(mDsDy);
1496                    pw.print(" mDtDy="); pw.println(mDtDy);
1497        }
1498    }
1499
1500    @Override
1501    public String toString() {
1502        StringBuffer sb = new StringBuffer("WindowStateAnimator (");
1503        sb.append(mWin.mLastTitle + "): ");
1504        sb.append("mSurface " + mSurface);
1505        sb.append(", mAnimation " + mAnimation);
1506        return sb.toString();
1507    }
1508}
1509