| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License |
| */ |
| |
| package com.android.server.wm; |
| |
| import static com.android.server.wm.proto.AlphaAnimationSpecProto.DURATION; |
| import static com.android.server.wm.proto.AlphaAnimationSpecProto.FROM; |
| import static com.android.server.wm.proto.AlphaAnimationSpecProto.TO; |
| import static com.android.server.wm.proto.AnimationSpecProto.ALPHA; |
| |
| import android.graphics.Rect; |
| import android.util.proto.ProtoOutputStream; |
| import android.view.SurfaceControl; |
| |
| import com.android.internal.annotations.VisibleForTesting; |
| |
| import java.io.PrintWriter; |
| |
| /** |
| * Utility class for use by a WindowContainer implementation to add "DimLayer" support, that is |
| * black layers of varying opacity at various Z-levels which create the effect of a Dim. |
| */ |
| class Dimmer { |
| private static final String TAG = "WindowManager"; |
| private static final int DEFAULT_DIM_ANIM_DURATION = 200; |
| |
| private class DimAnimatable implements SurfaceAnimator.Animatable { |
| private final SurfaceControl mDimLayer; |
| |
| private DimAnimatable(SurfaceControl dimLayer) { |
| mDimLayer = dimLayer; |
| } |
| |
| @Override |
| public SurfaceControl.Transaction getPendingTransaction() { |
| return mHost.getPendingTransaction(); |
| } |
| |
| @Override |
| public void commitPendingTransaction() { |
| mHost.commitPendingTransaction(); |
| } |
| |
| @Override |
| public void onAnimationLeashCreated(SurfaceControl.Transaction t, SurfaceControl leash) { |
| } |
| |
| @Override |
| public void onAnimationLeashDestroyed(SurfaceControl.Transaction t) { |
| } |
| |
| @Override |
| public SurfaceControl.Builder makeAnimationLeash() { |
| return mHost.makeAnimationLeash(); |
| } |
| |
| @Override |
| public SurfaceControl getAnimationLeashParent() { |
| return mHost.getSurfaceControl(); |
| } |
| |
| @Override |
| public SurfaceControl getSurfaceControl() { |
| return mDimLayer; |
| } |
| |
| @Override |
| public SurfaceControl getParentSurfaceControl() { |
| return mHost.getSurfaceControl(); |
| } |
| |
| @Override |
| public int getSurfaceWidth() { |
| // This will determine the size of the leash created. This should be the size of the |
| // host and not the dim layer since the dim layer may get bigger during animation. If |
| // that occurs, the leash size cannot change so we need to ensure the leash is big |
| // enough that the dim layer can grow. |
| // This works because the mHost will be a Task which has the display bounds. |
| return mHost.getSurfaceWidth(); |
| } |
| |
| @Override |
| public int getSurfaceHeight() { |
| // See getSurfaceWidth() above for explanation. |
| return mHost.getSurfaceHeight(); |
| } |
| } |
| |
| @VisibleForTesting |
| class DimState { |
| /** |
| * The layer where property changes should be invoked on. |
| */ |
| SurfaceControl mDimLayer; |
| boolean mDimming; |
| boolean isVisible; |
| SurfaceAnimator mSurfaceAnimator; |
| |
| /** |
| * Used for Dims not associated with a WindowContainer. See {@link Dimmer#dimAbove} for |
| * details on Dim lifecycle. |
| */ |
| boolean mDontReset; |
| |
| DimState(SurfaceControl dimLayer) { |
| mDimLayer = dimLayer; |
| mDimming = true; |
| mSurfaceAnimator = new SurfaceAnimator(new DimAnimatable(dimLayer), () -> { |
| if (!mDimming) { |
| mDimLayer.destroy(); |
| } |
| }, mHost.mService); |
| } |
| } |
| |
| /** |
| * The {@link WindowContainer} that our Dim's are bounded to. We may be dimming on behalf of the |
| * host, some controller of it, or one of the hosts children. |
| */ |
| private WindowContainer mHost; |
| private WindowContainer mLastRequestedDimContainer; |
| @VisibleForTesting |
| DimState mDimState; |
| |
| private final SurfaceAnimatorStarter mSurfaceAnimatorStarter; |
| |
| @VisibleForTesting |
| interface SurfaceAnimatorStarter { |
| void startAnimation(SurfaceAnimator surfaceAnimator, SurfaceControl.Transaction t, |
| AnimationAdapter anim, boolean hidden); |
| } |
| |
| Dimmer(WindowContainer host) { |
| this(host, SurfaceAnimator::startAnimation); |
| } |
| |
| Dimmer(WindowContainer host, SurfaceAnimatorStarter surfaceAnimatorStarter) { |
| mHost = host; |
| mSurfaceAnimatorStarter = surfaceAnimatorStarter; |
| } |
| |
| private SurfaceControl makeDimLayer() { |
| return mHost.makeChildSurface(null) |
| .setParent(mHost.getSurfaceControl()) |
| .setColorLayer(true) |
| .setName("Dim Layer for - " + mHost.getName()) |
| .build(); |
| } |
| |
| /** |
| * Retrieve the DimState, creating one if it doesn't exist. |
| */ |
| private DimState getDimState(WindowContainer container) { |
| if (mDimState == null) { |
| final SurfaceControl ctl = makeDimLayer(); |
| mDimState = new DimState(ctl); |
| /** |
| * See documentation on {@link #dimAbove} to understand lifecycle management of Dim's |
| * via state resetting for Dim's with containers. |
| */ |
| if (container == null) { |
| mDimState.mDontReset = true; |
| } |
| } |
| |
| mLastRequestedDimContainer = container; |
| return mDimState; |
| } |
| |
| private void dim(SurfaceControl.Transaction t, WindowContainer container, int relativeLayer, |
| float alpha) { |
| final DimState d = getDimState(container); |
| if (container != null) { |
| // The dim method is called from WindowState.prepareSurfaces(), which is always called |
| // in the correct Z from lowest Z to highest. This ensures that the dim layer is always |
| // relative to the highest Z layer with a dim. |
| t.setRelativeLayer(d.mDimLayer, container.getSurfaceControl(), relativeLayer); |
| } else { |
| t.setLayer(d.mDimLayer, Integer.MAX_VALUE); |
| } |
| t.setAlpha(d.mDimLayer, alpha); |
| |
| d.mDimming = true; |
| } |
| |
| /** |
| * Finish a dim started by dimAbove in the case there was no call to dimAbove. |
| * |
| * @param t A Transaction in which to finish the dim. |
| */ |
| void stopDim(SurfaceControl.Transaction t) { |
| DimState d = getDimState(null); |
| t.hide(d.mDimLayer); |
| d.isVisible = false; |
| d.mDontReset = false; |
| } |
| |
| /** |
| * Place a Dim above the entire host container. The caller is responsible for calling stopDim to |
| * remove this effect. If the Dim can be assosciated with a particular child of the host |
| * consider using the other variant of dimAbove which ties the Dim lifetime to the child |
| * lifetime more explicitly. |
| * |
| * @param t A transaction in which to apply the Dim. |
| * @param alpha The alpha at which to Dim. |
| */ |
| void dimAbove(SurfaceControl.Transaction t, float alpha) { |
| dim(t, null, 1, alpha); |
| } |
| |
| /** |
| * Place a dim above the given container, which should be a child of the host container. |
| * for each call to {@link WindowContainer#prepareSurfaces} the Dim state will be reset |
| * and the child should call dimAbove again to request the Dim to continue. |
| * |
| * @param t A transaction in which to apply the Dim. |
| * @param container The container which to dim above. Should be a child of our host. |
| * @param alpha The alpha at which to Dim. |
| */ |
| void dimAbove(SurfaceControl.Transaction t, WindowContainer container, float alpha) { |
| dim(t, container, 1, alpha); |
| } |
| |
| /** |
| * Like {@link #dimAbove} but places the dim below the given container. |
| * |
| * @param t A transaction in which to apply the Dim. |
| * @param container The container which to dim below. Should be a child of our host. |
| * @param alpha The alpha at which to Dim. |
| */ |
| |
| void dimBelow(SurfaceControl.Transaction t, WindowContainer container, float alpha) { |
| dim(t, container, -1, alpha); |
| } |
| |
| /** |
| * Mark all dims as pending completion on the next call to {@link #updateDims} |
| * |
| * This is intended for us by the host container, to be called at the beginning of |
| * {@link WindowContainer#prepareSurfaces}. After calling this, the container should |
| * chain {@link WindowContainer#prepareSurfaces} down to it's children to give them |
| * a chance to request dims to continue. |
| */ |
| void resetDimStates() { |
| if (mDimState != null && !mDimState.mDontReset) { |
| mDimState.mDimming = false; |
| } |
| } |
| |
| /** |
| * Call after invoking {@link WindowContainer#prepareSurfaces} on children as |
| * described in {@link #resetDimStates}. |
| * |
| * @param t A transaction in which to update the dims. |
| * @param bounds The bounds at which to dim. |
| * @return true if any Dims were updated. |
| */ |
| boolean updateDims(SurfaceControl.Transaction t, Rect bounds) { |
| if (mDimState == null) { |
| return false; |
| } |
| |
| if (!mDimState.mDimming) { |
| startDimExit(mLastRequestedDimContainer, mDimState.mSurfaceAnimator, t); |
| mDimState = null; |
| return false; |
| } else { |
| // TODO: Once we use geometry from hierarchy this falls away. |
| t.setSize(mDimState.mDimLayer, bounds.width(), bounds.height()); |
| t.setPosition(mDimState.mDimLayer, bounds.left, bounds.top); |
| if (!mDimState.isVisible) { |
| mDimState.isVisible = true; |
| t.show(mDimState.mDimLayer); |
| startDimEnter(mLastRequestedDimContainer, mDimState.mSurfaceAnimator, t); |
| } |
| return true; |
| } |
| } |
| |
| private void startDimEnter(WindowContainer container, SurfaceAnimator animator, |
| SurfaceControl.Transaction t) { |
| startAnim(container, animator, t, 0 /* startAlpha */, 1 /* endAlpha */); |
| } |
| |
| private void startDimExit(WindowContainer container, SurfaceAnimator animator, |
| SurfaceControl.Transaction t) { |
| startAnim(container, animator, t, 1 /* startAlpha */, 0 /* endAlpha */); |
| } |
| |
| private void startAnim(WindowContainer container, SurfaceAnimator animator, |
| SurfaceControl.Transaction t, float startAlpha, float endAlpha) { |
| mSurfaceAnimatorStarter.startAnimation(animator, t, new LocalAnimationAdapter( |
| new AlphaAnimationSpec(startAlpha, endAlpha, getDimDuration(container)), |
| mHost.mService.mSurfaceAnimationRunner), false /* hidden */); |
| } |
| |
| private long getDimDuration(WindowContainer container) { |
| // If there's no container, then there isn't an animation occurring while dimming. Set the |
| // duration to 0 so it immediately dims to the set alpha. |
| if (container == null) { |
| return 0; |
| } |
| |
| // Otherwise use the same duration as the animation on the WindowContainer |
| AnimationAdapter animationAdapter = container.mSurfaceAnimator.getAnimation(); |
| return animationAdapter == null ? DEFAULT_DIM_ANIM_DURATION |
| : animationAdapter.getDurationHint(); |
| } |
| |
| private static class AlphaAnimationSpec implements LocalAnimationAdapter.AnimationSpec { |
| private final long mDuration; |
| private final float mFromAlpha; |
| private final float mToAlpha; |
| |
| AlphaAnimationSpec(float fromAlpha, float toAlpha, long duration) { |
| mFromAlpha = fromAlpha; |
| mToAlpha = toAlpha; |
| mDuration = duration; |
| } |
| |
| @Override |
| public long getDuration() { |
| return mDuration; |
| } |
| |
| @Override |
| public void apply(SurfaceControl.Transaction t, SurfaceControl sc, long currentPlayTime) { |
| float alpha = ((float) currentPlayTime / getDuration()) * (mToAlpha - mFromAlpha) |
| + mFromAlpha; |
| t.setAlpha(sc, alpha); |
| } |
| |
| @Override |
| public void dump(PrintWriter pw, String prefix) { |
| pw.print(prefix); pw.print("from="); pw.print(mFromAlpha); |
| pw.print(" to="); pw.print(mToAlpha); |
| pw.print(" duration="); pw.println(mDuration); |
| } |
| |
| @Override |
| public void writeToProtoInner(ProtoOutputStream proto) { |
| final long token = proto.start(ALPHA); |
| proto.write(FROM, mFromAlpha); |
| proto.write(TO, mToAlpha); |
| proto.write(DURATION, mDuration); |
| proto.end(token); |
| } |
| } |
| } |