diff options
Diffstat (limited to 'src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java')
-rw-r--r-- | src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java | 77 |
1 files changed, 77 insertions, 0 deletions
diff --git a/src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java b/src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java new file mode 100644 index 000000000..98e69f60e --- /dev/null +++ b/src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java @@ -0,0 +1,77 @@ +/* + * 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; + } + +} + |