GLES20Layer.java revision aa6c24c21c727a196451332448d4e3b11a80be69 
1/*
2 * Copyright (C) 2011 The Android Open Source Project
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 *      http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17
18package android.view;
19
20/**
21 * An OpenGL ES 2.0 implementation of {@link HardwareLayer}.
22 */
23abstract class GLES20Layer extends HardwareLayer {
24    int mLayer;
25    Finalizer mFinalizer;
26
27    GLES20Layer() {
28    }
29
30    GLES20Layer(int width, int height, boolean opaque) {
31        super(width, height, opaque);
32    }
33
34    /**
35     * Returns the native layer object used to render this layer.
36     *
37     * @return A pointer to the native layer object, or 0 if the object is NULL
38     */
39    public int getLayer() {
40        return mLayer;
41    }
42
43
44    @Override
45    void destroy() {
46        if (mFinalizer != null) mFinalizer.destroy();
47        mLayer = 0;
48    }
49
50    static class Finalizer {
51        private int mLayerId;
52
53        public Finalizer(int layerId) {
54            mLayerId = layerId;
55        }
56
57        @Override
58        protected void finalize() throws Throwable {
59            try {
60                if (mLayerId != 0) {
61                    GLES20Canvas.nDestroyLayerDeferred(mLayerId);
62                }
63            } finally {
64                super.finalize();
65            }
66        }
67
68        void destroy() {
69            GLES20Canvas.nDestroyLayer(mLayerId);
70            mLayerId = 0;
71        }
72    }
73}
74