e65beaabe4
The ScreenShot layer is now created hidden. The screenshot itself
is aquired during the transaction when the layer is made visible.
This guarantees the screenshot and the layer happen atomically
with respect to screen updates.
Bug: 5534521
Change-Id: Ida23e1f13d5716ec83b78a15712e0646d6cf8729
339 lines
13 KiB
Java
339 lines
13 KiB
Java
/*
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* Copyright (C) 2010 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.android.server.wm;
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import android.content.Context;
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import android.graphics.Bitmap;
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import android.graphics.Canvas;
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import android.graphics.Matrix;
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import android.graphics.Paint;
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import android.graphics.PixelFormat;
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import android.graphics.PorterDuff;
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import android.graphics.PorterDuffXfermode;
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import android.graphics.Rect;
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import android.util.Slog;
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import android.view.Surface;
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import android.view.SurfaceSession;
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import android.view.animation.Animation;
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import android.view.animation.AnimationUtils;
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import android.view.animation.Transformation;
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class ScreenRotationAnimation {
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static final String TAG = "ScreenRotationAnimation";
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static final boolean DEBUG = false;
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static final int FREEZE_LAYER = WindowManagerService.TYPE_LAYER_MULTIPLIER * 200;
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final Context mContext;
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Surface mSurface;
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BlackFrame mBlackFrame;
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int mWidth, mHeight;
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int mSnapshotRotation;
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int mSnapshotDeltaRotation;
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int mOriginalRotation;
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int mOriginalWidth, mOriginalHeight;
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int mCurRotation;
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Animation mExitAnimation;
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final Transformation mExitTransformation = new Transformation();
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Animation mEnterAnimation;
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final Transformation mEnterTransformation = new Transformation();
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boolean mStarted;
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final Matrix mSnapshotInitialMatrix = new Matrix();
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final Matrix mSnapshotFinalMatrix = new Matrix();
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final Matrix mTmpMatrix = new Matrix();
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final float[] mTmpFloats = new float[9];
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public ScreenRotationAnimation(Context context, SurfaceSession session,
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boolean inTransaction, int originalWidth, int originalHeight, int originalRotation) {
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mContext = context;
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// Screenshot does NOT include rotation!
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mSnapshotRotation = 0;
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if (originalRotation == Surface.ROTATION_90
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|| originalRotation == Surface.ROTATION_270) {
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mWidth = originalHeight;
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mHeight = originalWidth;
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} else {
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mWidth = originalWidth;
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mHeight = originalHeight;
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}
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mOriginalRotation = originalRotation;
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mOriginalWidth = originalWidth;
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mOriginalHeight = originalHeight;
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if (!inTransaction) {
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if (WindowManagerService.SHOW_LIGHT_TRANSACTIONS) Slog.i(WindowManagerService.TAG,
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">>> OPEN TRANSACTION ScreenRotationAnimation");
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Surface.openTransaction();
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}
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try {
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try {
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mSurface = new Surface(session, 0, "FreezeSurface",
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-1, mWidth, mHeight, PixelFormat.OPAQUE, Surface.FX_SURFACE_SCREENSHOT | Surface.HIDDEN);
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if (mSurface == null || !mSurface.isValid()) {
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// Screenshot failed, punt.
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mSurface = null;
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return;
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}
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mSurface.setLayer(FREEZE_LAYER + 1);
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mSurface.show();
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} catch (Surface.OutOfResourcesException e) {
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Slog.w(TAG, "Unable to allocate freeze surface", e);
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}
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if (WindowManagerService.SHOW_TRANSACTIONS ||
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WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i(WindowManagerService.TAG,
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" FREEZE " + mSurface + ": CREATE");
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setRotation(originalRotation);
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} finally {
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if (!inTransaction) {
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Surface.closeTransaction();
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if (WindowManagerService.SHOW_LIGHT_TRANSACTIONS) Slog.i(WindowManagerService.TAG,
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"<<< CLOSE TRANSACTION ScreenRotationAnimation");
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}
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}
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}
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boolean hasScreenshot() {
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return mSurface != null;
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}
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static int deltaRotation(int oldRotation, int newRotation) {
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int delta = newRotation - oldRotation;
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if (delta < 0) delta += 4;
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return delta;
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}
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void setSnapshotTransform(Matrix matrix, float alpha) {
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if (mSurface != null) {
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matrix.getValues(mTmpFloats);
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mSurface.setPosition(mTmpFloats[Matrix.MTRANS_X],
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mTmpFloats[Matrix.MTRANS_Y]);
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mSurface.setMatrix(
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mTmpFloats[Matrix.MSCALE_X], mTmpFloats[Matrix.MSKEW_Y],
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mTmpFloats[Matrix.MSKEW_X], mTmpFloats[Matrix.MSCALE_Y]);
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mSurface.setAlpha(alpha);
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if (DEBUG) {
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float[] srcPnts = new float[] { 0, 0, mWidth, mHeight };
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float[] dstPnts = new float[4];
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matrix.mapPoints(dstPnts, srcPnts);
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Slog.i(TAG, "Original : (" + srcPnts[0] + "," + srcPnts[1]
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+ ")-(" + srcPnts[2] + "," + srcPnts[3] + ")");
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Slog.i(TAG, "Transformed: (" + dstPnts[0] + "," + dstPnts[1]
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+ ")-(" + dstPnts[2] + "," + dstPnts[3] + ")");
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}
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}
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}
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public static void createRotationMatrix(int rotation, int width, int height,
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Matrix outMatrix) {
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switch (rotation) {
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case Surface.ROTATION_0:
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outMatrix.reset();
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break;
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case Surface.ROTATION_90:
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outMatrix.setRotate(90, 0, 0);
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outMatrix.postTranslate(height, 0);
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break;
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case Surface.ROTATION_180:
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outMatrix.setRotate(180, 0, 0);
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outMatrix.postTranslate(width, height);
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break;
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case Surface.ROTATION_270:
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outMatrix.setRotate(270, 0, 0);
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outMatrix.postTranslate(0, width);
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break;
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}
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}
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// Must be called while in a transaction.
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public void setRotation(int rotation) {
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mCurRotation = rotation;
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// Compute the transformation matrix that must be applied
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// to the snapshot to make it stay in the same original position
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// with the current screen rotation.
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int delta = deltaRotation(rotation, mSnapshotRotation);
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createRotationMatrix(delta, mWidth, mHeight, mSnapshotInitialMatrix);
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if (DEBUG) Slog.v(TAG, "**** ROTATION: " + delta);
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setSnapshotTransform(mSnapshotInitialMatrix, 1.0f);
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}
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/**
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* Returns true if animating.
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*/
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public boolean dismiss(SurfaceSession session, long maxAnimationDuration,
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float animationScale, int finalWidth, int finalHeight) {
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if (mSurface == null) {
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// Can't do animation.
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return false;
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}
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// Figure out how the screen has moved from the original rotation.
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int delta = deltaRotation(mCurRotation, mOriginalRotation);
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switch (delta) {
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case Surface.ROTATION_0:
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mExitAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_0_exit);
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mEnterAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_0_enter);
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break;
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case Surface.ROTATION_90:
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mExitAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_plus_90_exit);
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mEnterAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_plus_90_enter);
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break;
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case Surface.ROTATION_180:
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mExitAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_180_exit);
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mEnterAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_180_enter);
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break;
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case Surface.ROTATION_270:
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mExitAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_minus_90_exit);
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mEnterAnimation = AnimationUtils.loadAnimation(mContext,
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com.android.internal.R.anim.screen_rotate_minus_90_enter);
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break;
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}
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// Initialize the animations. This is a hack, redefining what "parent"
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// means to allow supplying the last and next size. In this definition
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// "%p" is the original (let's call it "previous") size, and "%" is the
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// screen's current/new size.
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mEnterAnimation.initialize(finalWidth, finalHeight, mOriginalWidth, mOriginalHeight);
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mExitAnimation.initialize(finalWidth, finalHeight, mOriginalWidth, mOriginalHeight);
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mStarted = false;
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mExitAnimation.restrictDuration(maxAnimationDuration);
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mExitAnimation.scaleCurrentDuration(animationScale);
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mEnterAnimation.restrictDuration(maxAnimationDuration);
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mEnterAnimation.scaleCurrentDuration(animationScale);
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if (WindowManagerService.SHOW_LIGHT_TRANSACTIONS) Slog.i(WindowManagerService.TAG,
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">>> OPEN TRANSACTION ScreenRotationAnimation.dismiss");
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Surface.openTransaction();
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try {
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Rect outer = new Rect(-finalWidth, -finalHeight, finalWidth * 2, finalHeight * 2);
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Rect inner = new Rect(0, 0, finalWidth, finalHeight);
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mBlackFrame = new BlackFrame(session, outer, inner, FREEZE_LAYER);
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} catch (Surface.OutOfResourcesException e) {
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Slog.w(TAG, "Unable to allocate black surface", e);
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} finally {
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Surface.closeTransaction();
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if (WindowManagerService.SHOW_LIGHT_TRANSACTIONS) Slog.i(WindowManagerService.TAG,
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"<<< CLOSE TRANSACTION ScreenRotationAnimation.dismiss");
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}
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return true;
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}
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public void kill() {
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if (mSurface != null) {
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if (WindowManagerService.SHOW_TRANSACTIONS ||
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WindowManagerService.SHOW_SURFACE_ALLOC) Slog.i(WindowManagerService.TAG,
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" FREEZE " + mSurface + ": DESTROY");
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mSurface.destroy();
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mSurface = null;
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}
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if (mBlackFrame != null) {
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mBlackFrame.kill();
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}
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if (mExitAnimation != null) {
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mExitAnimation.cancel();
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mExitAnimation = null;
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}
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if (mEnterAnimation != null) {
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mEnterAnimation.cancel();
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mEnterAnimation = null;
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}
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}
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public boolean isAnimating() {
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return mEnterAnimation != null || mExitAnimation != null;
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}
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public boolean stepAnimation(long now) {
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if (mEnterAnimation == null && mExitAnimation == null) {
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return false;
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}
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if (!mStarted) {
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if (mEnterAnimation != null) {
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mEnterAnimation.setStartTime(now);
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}
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if (mExitAnimation != null) {
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mExitAnimation.setStartTime(now);
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}
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mStarted = true;
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}
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mExitTransformation.clear();
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boolean moreExit = false;
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if (mExitAnimation != null) {
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moreExit = mExitAnimation.getTransformation(now, mExitTransformation);
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if (DEBUG) Slog.v(TAG, "Stepped exit: " + mExitTransformation);
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if (!moreExit) {
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if (DEBUG) Slog.v(TAG, "Exit animation done!");
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mExitAnimation.cancel();
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mExitAnimation = null;
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mExitTransformation.clear();
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if (mSurface != null) {
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mSurface.hide();
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}
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}
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}
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mEnterTransformation.clear();
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boolean moreEnter = false;
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if (mEnterAnimation != null) {
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moreEnter = mEnterAnimation.getTransformation(now, mEnterTransformation);
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if (!moreEnter) {
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mEnterAnimation.cancel();
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mEnterAnimation = null;
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mEnterTransformation.clear();
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if (mBlackFrame != null) {
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mBlackFrame.hide();
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}
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} else {
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if (mBlackFrame != null) {
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mBlackFrame.setMatrix(mEnterTransformation.getMatrix());
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}
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}
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}
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mSnapshotFinalMatrix.setConcat(mExitTransformation.getMatrix(), mSnapshotInitialMatrix);
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setSnapshotTransform(mSnapshotFinalMatrix, mExitTransformation.getAlpha());
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return moreEnter || moreExit;
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}
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public Transformation getEnterTransformation() {
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return mEnterTransformation;
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}
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}
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