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package com.bumptech.glide.load.engine.bitmap_recycle;
import android.graphics.Bitmap;
import com.bumptech.glide.util.Util;
/**
* A strategy for reusing bitmaps that requires any returned bitmap's dimensions to exactly match those request.
*/
class AttributeStrategy implements LruPoolStrategy {
private final KeyPool keyPool = new KeyPool();
private final GroupedLinkedMap<Key, Bitmap> groupedMap = new GroupedLinkedMap<Key, Bitmap>();
public void put(Bitmap bitmap) {
final Key key = keyPool.get(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());
groupedMap.put(key, bitmap);
}
@Override
public Bitmap get(int width, int height, Bitmap.Config config) {
final Key key = keyPool.get(width, height, config);
return groupedMap.get(key);
}
@Override
public Bitmap removeLast() {
return groupedMap.removeLast();
}
@Override
public String logBitmap(Bitmap bitmap) {
return getBitmapString(bitmap);
}
@Override
public String logBitmap(int width, int height, Bitmap.Config config) {
return getBitmapString(width, height, config);
}
@Override
public int getSize(Bitmap bitmap) {
return Util.getBitmapByteSize(bitmap);
}
@Override
public String toString() {
return "AttributeStrategy:\n " + groupedMap;
}
private static String getBitmapString(Bitmap bitmap) {
return getBitmapString(bitmap.getWidth(), bitmap.getHeight(), bitmap.getConfig());
}
private static String getBitmapString(int width, int height, Bitmap.Config config) {
return "[" + width + "x" + height + "], " + config;
}
// Visible for testing.
static class KeyPool extends BaseKeyPool<Key> {
public Key get(int width, int height, Bitmap.Config config) {
Key result = get();
result.init(width, height, config);
return result;
}
@Override
protected Key create() {
return new Key(this);
}
}
// Visible for testing.
static class Key implements Poolable {
private final KeyPool pool;
private int width;
private int height;
// Config can be null :(
private Bitmap.Config config;
public Key(KeyPool pool) {
this.pool = pool;
}
public void init(int width, int height, Bitmap.Config config) {
this.width = width;
this.height = height;
this.config = config;
}
@Override
public boolean equals(Object o) {
if (o instanceof Key) {
Key other = (Key) o;
return width == other.width
&& height == other.height
&& config == other.config;
}
return false;
}
@Override
public int hashCode() {
int result = width;
result = 31 * result + height;
result = 31 * result + (config != null ? config.hashCode() : 0);
return result;
}
@Override
public String toString() {
return getBitmapString(width, height, config);
}
@Override
public void offer() {
pool.offer(this);
}
}
}
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