| /* |
| * Copyright (C) 2010 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; // TODO: use com.android.server.wm, once things move there |
| |
| import android.content.Context; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.graphics.Color; |
| import android.graphics.Matrix; |
| import android.graphics.Paint; |
| import android.graphics.PixelFormat; |
| import android.graphics.Rect; |
| import android.util.DisplayMetrics; |
| import android.util.Slog; |
| import android.view.Display; |
| import android.view.Surface; |
| import android.view.SurfaceSession; |
| import android.view.animation.Animation; |
| import android.view.animation.AnimationUtils; |
| import android.view.animation.Transformation; |
| |
| class ScreenRotationAnimation { |
| static final String TAG = "ScreenRotationAnimation"; |
| static final boolean DEBUG = false; |
| |
| final Context mContext; |
| final Display mDisplay; |
| Surface mSurface; |
| int mWidth, mHeight; |
| |
| int mSnapshotRotation; |
| int mSnapshotDeltaRotation; |
| int mOriginalRotation; |
| int mOriginalWidth, mOriginalHeight; |
| int mCurRotation; |
| |
| Animation mExitAnimation; |
| final Transformation mExitTransformation = new Transformation(); |
| Animation mEnterAnimation; |
| final Transformation mEnterTransformation = new Transformation(); |
| boolean mStarted; |
| |
| final DisplayMetrics mDisplayMetrics = new DisplayMetrics(); |
| final Matrix mSnapshotInitialMatrix = new Matrix(); |
| final Matrix mSnapshotFinalMatrix = new Matrix(); |
| final float[] mTmpFloats = new float[9]; |
| |
| public ScreenRotationAnimation(Context context, Display display, SurfaceSession session) { |
| mContext = context; |
| mDisplay = display; |
| |
| display.getMetrics(mDisplayMetrics); |
| |
| Bitmap screenshot = Surface.screenshot(0, 0); |
| |
| if (screenshot != null) { |
| // Screenshot does NOT include rotation! |
| mSnapshotRotation = 0; |
| mWidth = screenshot.getWidth(); |
| mHeight = screenshot.getHeight(); |
| } else { |
| // Just in case. |
| mSnapshotRotation = display.getRotation(); |
| mWidth = mDisplayMetrics.widthPixels; |
| mHeight = mDisplayMetrics.heightPixels; |
| } |
| |
| mOriginalRotation = display.getRotation(); |
| mOriginalWidth = mDisplayMetrics.widthPixels; |
| mOriginalHeight = mDisplayMetrics.heightPixels; |
| |
| Surface.openTransaction(); |
| if (mSurface != null) { |
| mSurface.destroy(); |
| mSurface = null; |
| } |
| try { |
| mSurface = new Surface(session, 0, "FreezeSurface", |
| -1, mWidth, mHeight, PixelFormat.OPAQUE, 0); |
| } catch (Surface.OutOfResourcesException e) { |
| Slog.w(TAG, "Unable to allocate freeze surface", e); |
| } |
| mSurface.setLayer(WindowManagerService.TYPE_LAYER_MULTIPLIER * 200); |
| setRotation(display.getRotation()); |
| |
| Rect dirty = new Rect(0, 0, mWidth, mHeight); |
| Canvas c = null; |
| try { |
| c = mSurface.lockCanvas(dirty); |
| } catch (IllegalArgumentException e) { |
| Slog.w(TAG, "Unable to lock surface", e); |
| return; |
| } catch (Surface.OutOfResourcesException e) { |
| Slog.w(TAG, "Unable to lock surface", e); |
| return; |
| } |
| if (c == null) { |
| Slog.w(TAG, "Null surface"); |
| return; |
| } |
| |
| if (screenshot != null) { |
| c.drawBitmap(screenshot, 0, 0, new Paint(0)); |
| } else { |
| c.drawColor(Color.GREEN); |
| } |
| |
| mSurface.unlockCanvasAndPost(c); |
| Surface.closeTransaction(); |
| |
| if (screenshot != null) { |
| screenshot.recycle(); |
| } |
| } |
| |
| static int deltaRotation(int oldRotation, int newRotation) { |
| int delta = newRotation - oldRotation; |
| if (delta < 0) delta += 4; |
| return delta; |
| } |
| |
| void setSnapshotTransform(Matrix matrix, float alpha) { |
| matrix.getValues(mTmpFloats); |
| mSurface.setPosition((int)mTmpFloats[Matrix.MTRANS_X], |
| (int)mTmpFloats[Matrix.MTRANS_Y]); |
| mSurface.setMatrix( |
| mTmpFloats[Matrix.MSCALE_X], mTmpFloats[Matrix.MSKEW_Y], |
| mTmpFloats[Matrix.MSKEW_X], mTmpFloats[Matrix.MSCALE_Y]); |
| mSurface.setAlpha(alpha); |
| if (DEBUG) { |
| float[] srcPnts = new float[] { 0, 0, mWidth, mHeight }; |
| float[] dstPnts = new float[4]; |
| matrix.mapPoints(dstPnts, srcPnts); |
| Slog.i(TAG, "Original : (" + srcPnts[0] + "," + srcPnts[1] |
| + ")-(" + srcPnts[2] + "," + srcPnts[3] + ")"); |
| Slog.i(TAG, "Transformed: (" + dstPnts[0] + "," + dstPnts[1] |
| + ")-(" + dstPnts[2] + "," + dstPnts[3] + ")"); |
| } |
| } |
| |
| // Must be called while in a transaction. |
| public void setRotation(int rotation) { |
| mCurRotation = rotation; |
| |
| // Compute the transformation matrix that must be applied |
| // to the snapshot to make it stay in the same original position |
| // with the current screen rotation. |
| int delta = deltaRotation(rotation, mSnapshotRotation); |
| switch (delta) { |
| case Surface.ROTATION_0: |
| mSnapshotInitialMatrix.reset(); |
| break; |
| case Surface.ROTATION_90: |
| mSnapshotInitialMatrix.setRotate(90, 0, 0); |
| mSnapshotInitialMatrix.postTranslate(mHeight, 0); |
| break; |
| case Surface.ROTATION_180: |
| mSnapshotInitialMatrix.setRotate(180, 0, 0); |
| mSnapshotInitialMatrix.postTranslate(mWidth, mHeight); |
| break; |
| case Surface.ROTATION_270: |
| mSnapshotInitialMatrix.setRotate(270, 0, 0); |
| mSnapshotInitialMatrix.postTranslate(0, mWidth); |
| break; |
| } |
| |
| if (DEBUG) Slog.v(TAG, "**** ROTATION: " + delta); |
| setSnapshotTransform(mSnapshotInitialMatrix, 1.0f); |
| } |
| |
| /** |
| * Returns true if animating. |
| */ |
| public boolean dismiss(long maxAnimationDuration, float animationScale) { |
| // Figure out how the screen has moved from the original rotation. |
| int delta = deltaRotation(mCurRotation, mOriginalRotation); |
| if (false && delta == 0) { |
| // Nothing changed, just remove the snapshot. |
| if (mSurface != null) { |
| mSurface.destroy(); |
| mSurface = null; |
| } |
| return false; |
| } |
| |
| switch (delta) { |
| case Surface.ROTATION_0: |
| mExitAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_0_exit); |
| mEnterAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_0_enter); |
| break; |
| case Surface.ROTATION_90: |
| mExitAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_plus_90_exit); |
| mEnterAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_plus_90_enter); |
| break; |
| case Surface.ROTATION_180: |
| mExitAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_180_exit); |
| mEnterAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_180_enter); |
| break; |
| case Surface.ROTATION_270: |
| mExitAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_minus_90_exit); |
| mEnterAnimation = AnimationUtils.loadAnimation(mContext, |
| com.android.internal.R.anim.screen_rotate_minus_90_enter); |
| break; |
| } |
| |
| mDisplay.getMetrics(mDisplayMetrics); |
| |
| // Initialize the animations. This is a hack, redefining what "parent" |
| // means to allow supplying the last and next size. In this definition |
| // "%p" is the original (let's call it "previous") size, and "%" is the |
| // screen's current/new size. |
| mEnterAnimation.initialize(mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels, |
| mOriginalWidth, mOriginalHeight); |
| mExitAnimation.initialize(mDisplayMetrics.widthPixels, mDisplayMetrics.heightPixels, |
| mOriginalWidth, mOriginalHeight); |
| mStarted = false; |
| |
| mExitAnimation.restrictDuration(maxAnimationDuration); |
| mExitAnimation.scaleCurrentDuration(animationScale); |
| mEnterAnimation.restrictDuration(maxAnimationDuration); |
| mEnterAnimation.scaleCurrentDuration(animationScale); |
| |
| return true; |
| } |
| |
| public void kill() { |
| if (mSurface != null) { |
| mSurface.destroy(); |
| mSurface = null; |
| } |
| if (mExitAnimation != null) { |
| mExitAnimation.cancel(); |
| mExitAnimation = null; |
| } |
| if (mEnterAnimation != null) { |
| mEnterAnimation.cancel(); |
| mEnterAnimation = null; |
| } |
| } |
| |
| public boolean isAnimating() { |
| return mEnterAnimation != null || mExitAnimation != null; |
| } |
| |
| public boolean stepAnimation(long now) { |
| if (mEnterAnimation == null && mExitAnimation == null) { |
| return false; |
| } |
| |
| if (!mStarted) { |
| mEnterAnimation.setStartTime(now); |
| mExitAnimation.setStartTime(now); |
| mStarted = true; |
| } |
| |
| mExitTransformation.clear(); |
| boolean moreExit = false; |
| if (mExitAnimation != null) { |
| moreExit = mExitAnimation.getTransformation(now, mExitTransformation); |
| if (DEBUG) Slog.v(TAG, "Stepped exit: " + mExitTransformation); |
| if (!moreExit) { |
| if (DEBUG) Slog.v(TAG, "Exit animation done!"); |
| mExitAnimation.cancel(); |
| mExitAnimation = null; |
| mExitTransformation.clear(); |
| if (mSurface != null) { |
| mSurface.destroy(); |
| mSurface = null; |
| } |
| } |
| } |
| |
| mEnterTransformation.clear(); |
| boolean moreEnter = false; |
| if (mEnterAnimation != null) { |
| moreEnter = mEnterAnimation.getTransformation(now, mEnterTransformation); |
| if (!moreEnter) { |
| mEnterAnimation.cancel(); |
| mEnterAnimation = null; |
| mEnterTransformation.clear(); |
| } |
| } |
| |
| if (mSurface != null) { |
| mSnapshotFinalMatrix.setConcat(mExitTransformation.getMatrix(), mSnapshotInitialMatrix); |
| setSnapshotTransform(mSnapshotFinalMatrix, mExitTransformation.getAlpha()); |
| } |
| |
| return moreEnter || moreExit; |
| } |
| |
| public Transformation getEnterTransformation() { |
| return mEnterTransformation; |
| } |
| } |