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-rw-r--r--src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java84
1 files changed, 84 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..587174668
--- /dev/null
+++ b/src/com/android/gallery3d/filtershow/pipeline/SharedBuffer.java
@@ -0,0 +1,84 @@
+/*
+ * 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;
+import android.util.Log;
+
+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 SharedBuffer() {
+ }
+
+ public synchronized void setProducer(Bitmap producer) {
+ mProducer = new Buffer(producer);
+ }
+
+ public synchronized Buffer getProducer() {
+ return mProducer;
+ }
+
+ public synchronized Buffer getConsumer() {
+ return mConsumer;
+ }
+
+ public synchronized void swapProducer() {
+ if (mProducer != null) {
+ mProducer.sync();
+ }
+ Buffer intermediate = mIntermediate;
+ mIntermediate = mProducer;
+ mProducer = intermediate;
+ mNeedsSwap = true;
+ }
+
+ public synchronized void swapConsumer() {
+ if (!mNeedsSwap) {
+ return;
+ }
+ if (mConsumer != null) {
+ mConsumer.sync();
+ }
+ 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;
+ }
+
+}
+