| /* |
| * Copyright 2014 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 android.hardware.camera2.cts.rs; |
| |
| import android.content.Context; |
| import android.renderscript.RenderScript; |
| import android.util.Log; |
| |
| // TODO : Replace with dependency injection |
| /** |
| * Singleton to hold {@link RenderScript} and {@link AllocationCache} objects. |
| * |
| * <p>The test method must call {@link #setContext} before attempting to retrieve |
| * the underlying objects.</p> * |
| */ |
| public class RenderScriptSingleton { |
| |
| private static final String TAG = "RenderScriptSingleton"; |
| |
| private static Context sContext; |
| private static RenderScript sRS; |
| private static AllocationCache sCache; |
| |
| /** |
| * Initialize the singletons from the given context; the |
| * {@link RenderScript} and {@link AllocationCache} objects are instantiated. |
| * |
| * @param context a non-{@code null} Context. |
| * |
| * @throws IllegalStateException If this was called repeatedly without {@link #clearContext} |
| */ |
| public static synchronized void setContext(Context context) { |
| if (context.equals(sContext)) { |
| return; |
| } else if (sContext != null) { |
| Log.v(TAG, |
| "Trying to set new context " + context + |
| ", before clearing previous "+ sContext); |
| throw new IllegalStateException( |
| "Call #clearContext before trying to set a new context"); |
| } |
| |
| sRS = RenderScript.create(context); |
| sContext = context; |
| sCache = new AllocationCache(sRS); |
| } |
| |
| /** |
| * Clean up the singletons from the given context; the |
| * {@link RenderScript} and {@link AllocationCache} objects are destroyed. |
| * |
| * <p>Safe to call multiple times; subsequent invocations have no effect.</p> |
| */ |
| public static synchronized void clearContext() { |
| if (sContext != null) { |
| sCache.close(); |
| sCache = null; |
| |
| sRS.releaseAllContexts(); |
| sRS = null; |
| sContext = null; |
| } |
| } |
| |
| /** |
| * Get the current {@link RenderScript} singleton. |
| * |
| * @return A non-{@code null} {@link RenderScript} object. |
| * |
| * @throws IllegalStateException if {@link #setContext} was not called prior to this |
| */ |
| public static synchronized RenderScript getRS() { |
| if (sRS == null) { |
| throw new IllegalStateException("Call #setContext before using #get"); |
| } |
| |
| return sRS; |
| } |
| /** |
| * Get the current {@link AllocationCache} singleton. |
| * |
| * @return A non-{@code null} {@link AllocationCache} object. |
| * |
| * @throws IllegalStateException if {@link #setContext} was not called prior to this |
| */ |
| public static synchronized AllocationCache getCache() { |
| if (sCache == null) { |
| throw new IllegalStateException("Call #setContext before using #getCache"); |
| } |
| |
| return sCache; |
| } |
| |
| // Suppress default constructor for noninstantiability |
| private RenderScriptSingleton() { throw new AssertionError(); } |
| } |