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/*
* Copyright (C) 2009 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.camera.gallery;
import com.android.camera.Util;
import android.content.ContentResolver;
import android.content.ContentValues;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.media.ExifInterface;
import android.net.Uri;
import android.provider.BaseColumns;
import android.provider.MediaStore.Images;
import android.provider.MediaStore.Images.ImageColumns;
import android.util.Log;
import java.io.IOException;
/**
* The class for normal images in gallery.
*/
public class Image extends BaseImage implements IImage {
private static final String TAG = "BaseImage";
private ExifInterface mExif;
private int mRotation;
public Image(BaseImageList container, ContentResolver cr,
long id, int index, Uri uri, String dataPath, long miniThumbMagic,
String mimeType, long dateTaken, String title, String displayName,
int rotation) {
super(container, cr, id, index, uri, dataPath, miniThumbMagic,
mimeType, dateTaken, title, displayName);
mRotation = rotation;
}
@Override
public int getDegreesRotated() {
return mRotation;
}
protected void setDegreesRotated(int degrees) {
if (mRotation == degrees) return;
mRotation = degrees;
ContentValues values = new ContentValues();
values.put(ImageColumns.ORIENTATION, mRotation);
mContentResolver.update(mUri, values, null, null);
//TODO: Consider invalidate the cursor in container
// ((BaseImageList) getContainer()).invalidateCursor();
}
public boolean isReadonly() {
String mimeType = getMimeType();
return !"image/jpeg".equals(mimeType) && !"image/png".equals(mimeType);
}
public boolean isDrm() {
return false;
}
/**
* Replaces the tag if already there. Otherwise, adds to the exif tags.
* @param tag
* @param value
*/
public void replaceExifTag(String tag, String value) {
if (mExif == null) {
loadExifData();
}
mExif.setAttribute(tag, value);
}
private void loadExifData() {
try {
mExif = new ExifInterface(mDataPath);
} catch (IOException ex) {
Log.e(TAG, "cannot read exif", ex);
}
}
private void saveExifData() throws IOException {
if (mExif != null) {
mExif.saveAttributes();
}
}
private void setExifRotation(int degrees) {
try {
degrees %= 360;
if (degrees < 0) degrees += 360;
int orientation = ExifInterface.ORIENTATION_NORMAL;
switch (degrees) {
case 0:
orientation = ExifInterface.ORIENTATION_NORMAL;
break;
case 90:
orientation = ExifInterface.ORIENTATION_ROTATE_90;
break;
case 180:
orientation = ExifInterface.ORIENTATION_ROTATE_180;
break;
case 270:
orientation = ExifInterface.ORIENTATION_ROTATE_270;
break;
}
replaceExifTag(ExifInterface.TAG_ORIENTATION,
Integer.toString(orientation));
saveExifData();
} catch (Exception ex) {
Log.e(TAG, "unable to save exif data with new orientation "
+ fullSizeImageUri(), ex);
}
}
/**
* Save the rotated image by updating the Exif "Orientation" tag.
* @param degrees
*/
public boolean rotateImageBy(int degrees) {
int newDegrees = (getDegreesRotated() + degrees) % 360;
setExifRotation(newDegrees);
setDegreesRotated(newDegrees);
return true;
}
private static final String[] THUMB_PROJECTION = new String[] {
BaseColumns._ID,
};
public Bitmap thumbBitmap(boolean rotateAsNeeded) {
Bitmap bitmap = null;
BitmapFactory.Options options = new BitmapFactory.Options();
options.inDither = false;
options.inPreferredConfig = Bitmap.Config.ARGB_8888;
bitmap = Images.Thumbnails.getThumbnail(
mContentResolver, mId, Images.Thumbnails.MINI_KIND, options);
if (bitmap != null && rotateAsNeeded) {
bitmap = Util.rotate(bitmap, getDegreesRotated());
}
return bitmap;
}
}
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