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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.gallery;
     18 
     19 import com.android.camera.BitmapManager;
     20 import com.android.camera.Util;
     21 
     22 import android.content.ContentResolver;
     23 import android.content.ContentValues;
     24 import android.graphics.Bitmap;
     25 import android.graphics.BitmapFactory;
     26 import android.media.ExifInterface;
     27 import android.net.Uri;
     28 import android.provider.BaseColumns;
     29 import android.provider.MediaStore.Images;
     30 import android.provider.MediaStore.Images.ImageColumns;
     31 import android.util.Log;
     32 
     33 import java.io.IOException;
     34 
     35 /**
     36  * The class for normal images in gallery.
     37  */
     38 public class Image extends BaseImage implements IImage {
     39     private static final String TAG = "BaseImage";
     40 
     41     private ExifInterface mExif;
     42 
     43     private int mRotation;
     44 
     45     public Image(BaseImageList container, ContentResolver cr,
     46             long id, int index, Uri uri, String dataPath,
     47             String mimeType, long dateTaken, String title,
     48             int rotation) {
     49         super(container, cr, id, index, uri, dataPath,
     50                 mimeType, dateTaken, title);
     51         mRotation = rotation;
     52     }
     53 
     54     @Override
     55     public int getDegreesRotated() {
     56         return mRotation;
     57     }
     58 
     59     protected void setDegreesRotated(int degrees) {
     60         if (mRotation == degrees) return;
     61         mRotation = degrees;
     62         ContentValues values = new ContentValues();
     63         values.put(ImageColumns.ORIENTATION, mRotation);
     64         mContentResolver.update(mUri, values, null, null);
     65 
     66         //TODO: Consider invalidate the cursor in container
     67         // ((BaseImageList) getContainer()).invalidateCursor();
     68     }
     69 
     70     public boolean isReadonly() {
     71         String mimeType = getMimeType();
     72         return !"image/jpeg".equals(mimeType) && !"image/png".equals(mimeType);
     73     }
     74 
     75     public boolean isDrm() {
     76         return false;
     77     }
     78 
     79     /**
     80      * Replaces the tag if already there. Otherwise, adds to the exif tags.
     81      * @param tag
     82      * @param value
     83      */
     84     public void replaceExifTag(String tag, String value) {
     85         if (mExif == null) {
     86             loadExifData();
     87         }
     88         mExif.setAttribute(tag, value);
     89     }
     90 
     91     private void loadExifData() {
     92         try {
     93             mExif = new ExifInterface(mDataPath);
     94         } catch (IOException ex) {
     95             Log.e(TAG, "cannot read exif", ex);
     96         }
     97     }
     98 
     99     private void saveExifData() throws IOException {
    100         if (mExif != null) {
    101             mExif.saveAttributes();
    102         }
    103     }
    104 
    105     private void setExifRotation(int degrees) {
    106         try {
    107             degrees %= 360;
    108             if (degrees < 0) degrees += 360;
    109 
    110             int orientation = ExifInterface.ORIENTATION_NORMAL;
    111             switch (degrees) {
    112                 case 0:
    113                     orientation = ExifInterface.ORIENTATION_NORMAL;
    114                     break;
    115                 case 90:
    116                     orientation = ExifInterface.ORIENTATION_ROTATE_90;
    117                     break;
    118                 case 180:
    119                     orientation = ExifInterface.ORIENTATION_ROTATE_180;
    120                     break;
    121                 case 270:
    122                     orientation = ExifInterface.ORIENTATION_ROTATE_270;
    123                     break;
    124             }
    125 
    126             replaceExifTag(ExifInterface.TAG_ORIENTATION,
    127                     Integer.toString(orientation));
    128             saveExifData();
    129         } catch (Exception ex) {
    130             Log.e(TAG, "unable to save exif data with new orientation "
    131                     + fullSizeImageUri(), ex);
    132         }
    133     }
    134 
    135     /**
    136      * Save the rotated image by updating the Exif "Orientation" tag.
    137      * @param degrees
    138      */
    139     public boolean rotateImageBy(int degrees) {
    140         int newDegrees = (getDegreesRotated() + degrees) % 360;
    141         setExifRotation(newDegrees);
    142         setDegreesRotated(newDegrees);
    143 
    144         return true;
    145     }
    146 
    147     private static final String[] THUMB_PROJECTION = new String[] {
    148         BaseColumns._ID,
    149     };
    150 
    151     public Bitmap thumbBitmap(boolean rotateAsNeeded) {
    152         Bitmap bitmap = null;
    153         BitmapFactory.Options options = new BitmapFactory.Options();
    154         options.inDither = false;
    155         options.inPreferredConfig = Bitmap.Config.ARGB_8888;
    156         bitmap = BitmapManager.instance().getThumbnail(mContentResolver, mId,
    157                 Images.Thumbnails.MINI_KIND, options, false);
    158 
    159         if (bitmap != null && rotateAsNeeded) {
    160             bitmap = Util.rotate(bitmap, getDegreesRotated());
    161         }
    162 
    163         return bitmap;
    164     }
    165 }
    166