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      1 /*
      2  * Copyright (C) 2009 The Android Open Source Project
      3  *
      4  * Licensed under the Apache License, Version 2.0 (the "License");
      5  * you may not use this file except in compliance with the License.
      6  * You may obtain a copy of the License at
      7  *
      8  *      http://www.apache.org/licenses/LICENSE-2.0
      9  *
     10  * Unless required by applicable law or agreed to in writing, software
     11  * distributed under the License is distributed on an "AS IS" BASIS,
     12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
     13  * See the License for the specific language governing permissions and
     14  * limitations under the License.
     15  */
     16 
     17 package com.android.camera;
     18 
     19 import android.graphics.Bitmap;
     20 import android.graphics.Matrix;
     21 
     22 public class RotateBitmap {
     23     public static final String TAG = "RotateBitmap";
     24     private Bitmap mBitmap;
     25     private int mRotation;
     26 
     27     public RotateBitmap(Bitmap bitmap) {
     28         mBitmap = bitmap;
     29         mRotation = 0;
     30     }
     31 
     32     public RotateBitmap(Bitmap bitmap, int rotation) {
     33         mBitmap = bitmap;
     34         mRotation = rotation % 360;
     35     }
     36 
     37     public void setRotation(int rotation) {
     38         mRotation = rotation;
     39     }
     40 
     41     public int getRotation() {
     42         return mRotation;
     43     }
     44 
     45     public Bitmap getBitmap() {
     46         return mBitmap;
     47     }
     48 
     49     public void setBitmap(Bitmap bitmap) {
     50         mBitmap = bitmap;
     51     }
     52 
     53     public Matrix getRotateMatrix() {
     54         // By default this is an identity matrix.
     55         Matrix matrix = new Matrix();
     56         if (mRotation != 0) {
     57             // We want to do the rotation at origin, but since the bounding
     58             // rectangle will be changed after rotation, so the delta values
     59             // are based on old & new width/height respectively.
     60             int cx = mBitmap.getWidth() / 2;
     61             int cy = mBitmap.getHeight() / 2;
     62             matrix.preTranslate(-cx, -cy);
     63             matrix.postRotate(mRotation);
     64             matrix.postTranslate(getWidth() / 2, getHeight() / 2);
     65         }
     66         return matrix;
     67     }
     68 
     69     public boolean isOrientationChanged() {
     70         return (mRotation / 90) % 2 != 0;
     71     }
     72 
     73     public int getHeight() {
     74         if (isOrientationChanged()) {
     75             return mBitmap.getWidth();
     76         } else {
     77             return mBitmap.getHeight();
     78         }
     79     }
     80 
     81     public int getWidth() {
     82         if (isOrientationChanged()) {
     83             return mBitmap.getHeight();
     84         } else {
     85             return mBitmap.getWidth();
     86         }
     87     }
     88 
     89     public void recycle() {
     90         if (mBitmap != null) {
     91             mBitmap.recycle();
     92             mBitmap = null;
     93         }
     94     }
     95 }
     96 
     97