| /* |
| * 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 synchronized void setProducer(Bitmap producer) { |
| if (mProducer != null |
| && !mProducer.isSameSize(producer)) { |
| mProducer.remove(); |
| mProducer = null; |
| } |
| if (mProducer == null) { |
| mProducer = new Buffer(producer); |
| } else { |
| mProducer.useBitmap(producer); |
| } |
| } |
| |
| 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; |
| } |
| |
| } |
| |