Change rotation freeze to all be implemented in window manager.
Lots of work for no visible change in behavior, but now we can
do some fancier stuff...
Also allow rotation in all 4 directions.
Change-Id: I7e5e9537c5e359f69b83c10f65cc1ce95f371461
diff --git a/services/java/com/android/server/ScreenRotationAnimation.java b/services/java/com/android/server/ScreenRotationAnimation.java
new file mode 100644
index 0000000..299567a
--- /dev/null
+++ b/services/java/com/android/server/ScreenRotationAnimation.java
@@ -0,0 +1,152 @@
+/*
+ * 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.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;
+
+class ScreenRotationAnimation {
+ private static final String TAG = "ScreenRotationAnimation";
+
+ Surface mSurface;
+ int mWidth, mHeight;
+
+ int mBaseRotation;
+ int mCurRotation;
+ int mDeltaRotation;
+
+ final Matrix mMatrix = new Matrix();
+ final float[] mTmpFloats = new float[9];
+
+ public ScreenRotationAnimation(Display display, SurfaceSession session) {
+ final DisplayMetrics dm = new DisplayMetrics();
+ display.getMetrics(dm);
+
+ Bitmap screenshot = Surface.screenshot(0, 0);
+
+ if (screenshot != null) {
+ // Screenshot does NOT include rotation!
+ mBaseRotation = 0;
+ mWidth = screenshot.getWidth();
+ mHeight = screenshot.getHeight();
+ } else {
+ // Just in case.
+ mBaseRotation = display.getRotation();
+ mWidth = dm.widthPixels;
+ mHeight = dm.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();
+
+ screenshot.recycle();
+ }
+
+ // Must be called while in a transaction.
+ public void setRotation(int rotation) {
+ mCurRotation = rotation;
+ int delta = mCurRotation - mBaseRotation;
+ if (delta < 0) delta += 4;
+ mDeltaRotation = delta;
+
+ switch (delta) {
+ case Surface.ROTATION_0:
+ mMatrix.reset();
+ break;
+ case Surface.ROTATION_90:
+ mMatrix.setRotate(90, 0, 0);
+ mMatrix.postTranslate(0, mWidth);
+ break;
+ case Surface.ROTATION_180:
+ mMatrix.setRotate(180, 0, 0);
+ mMatrix.postTranslate(mWidth, mHeight);
+ break;
+ case Surface.ROTATION_270:
+ mMatrix.setRotate(270, 0, 0);
+ mMatrix.postTranslate(mHeight, 0);
+ break;
+ }
+
+ mMatrix.getValues(mTmpFloats);
+ mSurface.setPosition((int)mTmpFloats[Matrix.MTRANS_X],
+ (int)mTmpFloats[Matrix.MTRANS_Y]);
+ mSurface.setMatrix(
+ mTmpFloats[Matrix.MSCALE_X], mTmpFloats[Matrix.MSKEW_X],
+ mTmpFloats[Matrix.MSKEW_Y], mTmpFloats[Matrix.MSCALE_Y]);
+
+ if (false) {
+ float[] srcPnts = new float[] { 0, 0, mWidth, mHeight };
+ float[] dstPnts = new float[8];
+ mMatrix.mapPoints(dstPnts, srcPnts);
+ Slog.i(TAG, "**** ROTATION: " + delta);
+ Slog.i(TAG, "Original : (" + srcPnts[0] + "," + srcPnts[1]
+ + ")-(" + srcPnts[2] + "," + srcPnts[3] + ")");
+ Slog.i(TAG, "Transformed: (" + dstPnts[0] + "," + dstPnts[1]
+ + ")-(" + dstPnts[2] + "," + dstPnts[3] + ")");
+ }
+ }
+
+ public void dismiss() {
+ mSurface.destroy();
+ }
+}