1 /* 2 * Copyright (C) 2018 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 android.util.imagepool; 18 19 import com.android.tools.layoutlib.annotations.Nullable; 20 import com.android.tools.layoutlib.annotations.VisibleForTesting; 21 22 import android.util.imagepool.ImagePool.Image.Orientation; 23 24 import java.awt.image.BufferedImage; 25 import java.lang.ref.SoftReference; 26 import java.util.LinkedList; 27 import java.util.Queue; 28 29 /** 30 * Data model for image pool. Bucket contains the list of same sized buffered image in soft ref. 31 */ 32 /* private package */ class Bucket { 33 34 @VisibleForTesting final Queue<SoftReference<BufferedImage>> mBufferedImageRef = new LinkedList<>(); 35 isEmpty()36 public boolean isEmpty() { 37 return mBufferedImageRef.isEmpty(); 38 } 39 40 @Nullable remove()41 public BufferedImage remove() { 42 if (mBufferedImageRef.isEmpty()) { 43 return null; 44 } 45 46 SoftReference<BufferedImage> reference = mBufferedImageRef.remove(); 47 return reference == null ? null : reference.get(); 48 } 49 offer(BufferedImage img)50 public void offer(BufferedImage img) { 51 mBufferedImageRef.offer(new SoftReference<>(img)); 52 } 53 clear()54 public void clear() { 55 mBufferedImageRef.clear(); 56 } 57 58 static class BucketCreationMetaData { 59 public final int mWidth; 60 public final int mHeight; 61 public final int mType; 62 public final int mNumberOfCopies; 63 public final Orientation mOrientation; 64 public final long mMaxCacheSize; 65 BucketCreationMetaData(int width, int height, int type, int numberOfCopies, Orientation orientation, long maxCacheSize)66 BucketCreationMetaData(int width, int height, int type, int numberOfCopies, 67 Orientation orientation, long maxCacheSize) { 68 mWidth = width; 69 mHeight = height; 70 mType = type; 71 mNumberOfCopies = numberOfCopies; 72 mOrientation = orientation; 73 mMaxCacheSize = maxCacheSize; 74 } 75 } 76 }