graphics/java/android/graphics/ColorFilter.java

/*
 * 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.
 */

// This file was generated from the C++ include file: SkColorFilter.h
// Any changes made to this file will be discarded by the build.
// To change this file, either edit the include, or device/tools/gluemaker/main.cpp, 
// or one of the auxilary file specifications in device/tools/gluemaker.

package android.graphics;

/**
 * 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 {
    /**
     * @deprecated Use subclass constructors directly instead.
     */
    @Deprecated
    public ColorFilter() {}

    /**
     * Holds the pointer to the native SkColorFilter instance.
     */
    private long mNativeInstance;

    long createNativeInstance() {
        return 0;
    }

    void discardNativeInstance() {
        if (mNativeInstance != 0) {
            nSafeUnref(mNativeInstance);
            mNativeInstance = 0;
        }
    }

    @Override
    protected void finalize() throws Throwable {
        try {
            if (mNativeInstance != 0) {
                nSafeUnref(mNativeInstance);
            }
            mNativeInstance = -1;
        } finally {
            super.finalize();
        }
    }

    /** @hide */
    public long getNativeInstance() {
        if (mNativeInstance == -1) {
            throw new IllegalStateException("attempting to use a finalized ColorFilter");
        }

        if (mNativeInstance == 0) {
            mNativeInstance = createNativeInstance();
        }
        return mNativeInstance;

    }

    static native void nSafeUnref(long native_instance);
}