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/*
* Copyright (C) 2013 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.gallery3d.filtershow.pipeline;
import android.graphics.Bitmap;
public class SharedBuffer {
private static final String LOGTAG = "SharedBuffer";
private volatile Buffer mProducer = null;
private volatile Buffer mConsumer = null;
private volatile Buffer mIntermediate = null;
private volatile boolean mNeedsSwap = false;
private volatile boolean mNeedsRepaint = true;
public void setProducer(Bitmap producer) {
Buffer buffer = new Buffer(producer);
synchronized (this) {
mProducer = buffer;
}
}
public synchronized Buffer getProducer() {
return mProducer;
}
public synchronized Buffer getConsumer() {
return mConsumer;
}
public synchronized void swapProducer() {
Buffer intermediate = mIntermediate;
mIntermediate = mProducer;
mProducer = intermediate;
mNeedsSwap = true;
}
public synchronized void swapConsumerIfNeeded() {
if (!mNeedsSwap) {
return;
}
Buffer intermediate = mIntermediate;
mIntermediate = mConsumer;
mConsumer = intermediate;
mNeedsSwap = false;
}
public synchronized void invalidate() {
mNeedsRepaint = true;
}
public synchronized boolean checkRepaintNeeded() {
if (mNeedsRepaint) {
mNeedsRepaint = false;
return true;
}
return false;
}
}
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