| /* |
| * Copyright (C) 2006 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.graphics; |
| |
| import libcore.util.NativeAllocationRegistry; |
| |
| /** |
| * A color filter can be used with a {@link Paint} to modify the color of |
| * each pixel drawn with that paint. This is an abstract class that should |
| * never be used directly. |
| */ |
| public class ColorFilter { |
| |
| private static class NoImagePreloadHolder { |
| public static final NativeAllocationRegistry sRegistry = new NativeAllocationRegistry( |
| ColorFilter.class.getClassLoader(), nativeGetFinalizer(), 50); |
| } |
| |
| /** |
| * @deprecated Use subclass constructors directly instead. |
| */ |
| @Deprecated |
| public ColorFilter() {} |
| |
| /** |
| * Current native SkColorFilter instance. |
| */ |
| private long mNativeInstance; |
| // Runnable to do immediate destruction |
| private Runnable mCleaner; |
| |
| long createNativeInstance() { |
| return 0; |
| } |
| |
| void discardNativeInstance() { |
| if (mNativeInstance != 0) { |
| mCleaner.run(); |
| mCleaner = null; |
| mNativeInstance = 0; |
| } |
| } |
| |
| /** @hide */ |
| public long getNativeInstance() { |
| if (mNativeInstance == 0) { |
| mNativeInstance = createNativeInstance(); |
| |
| if (mNativeInstance != 0) { |
| // Note: we must check for null here, since it's possible for createNativeInstance() |
| // to return nullptr if the native SkColorFilter would be a no-op at draw time. |
| // See native implementations of subclass create methods for more info. |
| mCleaner = NoImagePreloadHolder.sRegistry.registerNativeAllocation( |
| this, mNativeInstance); |
| } |
| } |
| return mNativeInstance; |
| |
| } |
| |
| private static native long nativeGetFinalizer(); |
| } |