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/*
* Copyright (C) 2014 The CyanogenMod 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 org.cyanogenmod.themes.provider;
import android.content.Context;
import android.graphics.Bitmap;
import android.graphics.BitmapFactory;
import android.net.Uri;
import android.util.Log;
import java.io.Closeable;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.InputStream;
public class BitmapUtils {
private static final String TAG = "BitmapUtils";
private static final int BITMAP_LOAD_BACKOUT_ATTEMPTS = 5;
/**
* Returns the bitmap from the given uri loaded using the given options.
* Returns null on failure.
*/
public static Bitmap loadBitmap(Context context, InputStream is, BitmapFactory.Options o) {
try {
return BitmapFactory.decodeStream(is, null, o);
} finally {
closeSilently(is);
}
}
/**
* Loads a bitmap that has been downsampled using sampleSize from a given url.
*/
public static Bitmap loadDownsampledBitmap(Context context, InputStream is, int sampleSize) {
BitmapFactory.Options options = new BitmapFactory.Options();
options.inMutable = true;
options.inSampleSize = sampleSize;
return loadBitmap(context, is, options);
}
/**
* Loads a bitmap that is downsampled by at least the input sample size. In
* low-memory situations, the bitmap may be downsampled further.
*/
public static Bitmap loadBitmapWithBackouts(Context context, InputStream is, int sampleSize) {
boolean noBitmap = true;
int num_tries = 0;
if (sampleSize <= 0) {
sampleSize = 1;
}
Bitmap bmap = null;
while (noBitmap) {
try {
// Try to decode, downsample if low-memory.
bmap = loadDownsampledBitmap(context, is, sampleSize);
noBitmap = false;
} catch (java.lang.OutOfMemoryError e) {
// Try with more downsampling before failing for good.
if (++num_tries >= BITMAP_LOAD_BACKOUT_ATTEMPTS) {
throw e;
}
bmap = null;
System.gc();
sampleSize *= 2;
}
}
return bmap;
}
public static void closeSilently(Closeable c) {
if (c == null) return;
try {
c.close();
} catch (IOException t) {
Log.w(TAG, "close fail ", t);
}
}
}
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