public boolean stepAnimation(long now) {
if (mEnterAnimation == null && mExitAnimation == null) {
return false;
}
if (!mStarted) {
if (mEnterAnimation != null) {
mEnterAnimation.setStartTime(now);
}
if (mExitAnimation != null) {
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.hide();
}
}
}
mEnterTransformation.clear();
boolean moreEnter = false;
if (mEnterAnimation != null) {
moreEnter = mEnterAnimation.getTransformation(now, mEnterTransformation);
if (!moreEnter) {
mEnterAnimation.cancel();
mEnterAnimation = null;
mEnterTransformation.clear();
if (mBlackFrame != null) {
mBlackFrame.hide();
}
} else {
if (mBlackFrame != null) {
mBlackFrame.setMatrix(mEnterTransformation.getMatrix());
}
}
}
mSnapshotFinalMatrix.setConcat(mExitTransformation.getMatrix(), mSnapshotInitialMatrix);
setSnapshotTransform(mSnapshotFinalMatrix, mExitTransformation.getAlpha());
return moreEnter || moreExit;
}
// 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);
createRotationMatrix(delta, mWidth, mHeight, mSnapshotInitialMatrix);
if (DEBUG) Slog.v(TAG, "**** ROTATION: " + delta);
setSnapshotTransform(mSnapshotInitialMatrix, 1.0f);
}