BitmapCompat.java revision ddb24f29a236175d3cda4c11bda98a6212ecf9e5 
1/*
2 * Copyright (C) 2014 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 */
16package android.support.v4.graphics;
17
18import android.graphics.Bitmap;
19
20/**
21 * Helper for accessing features in {@link android.graphics.Bitmap}
22 * introduced after API level 4 in a backwards compatible fashion.
23 */
24public class BitmapCompat {
25    /**
26     * Interface for the full API.
27     */
28    interface BitmapImpl {
29        public boolean hasMipMap(Bitmap bitmap);
30        public void setHasMipMap(Bitmap bitmap, boolean hasMipMap);
31    }
32
33    /**
34     * Interface implementation that doesn't use anything about v4 APIs.
35     */
36    static class BaseBitmapImpl implements BitmapImpl {
37        @Override
38        public boolean hasMipMap(Bitmap bitmap) {
39            return false;
40        }
41
42        @Override
43        public void setHasMipMap(Bitmap bitmap, boolean hasMipMap) {
44        }
45    }
46
47    static class JbMr2BitmapCompatImpl extends BaseBitmapImpl {
48        @Override
49        public boolean hasMipMap(Bitmap bitmap){
50            return BitmapCompatJellybeanMR2.hasMipMap(bitmap);
51        }
52
53        @Override
54        public void setHasMipMap(Bitmap bitmap, boolean hasMipMap) {
55            BitmapCompatJellybeanMR2.setHasMipMap(bitmap, hasMipMap);
56        }
57    }
58
59    /**
60     * Select the correct implementation to use for the current platform.
61     */
62    static final BitmapImpl IMPL;
63    static {
64        final int version = android.os.Build.VERSION.SDK_INT;
65        if (version >= 18) {
66            IMPL = new JbMr2BitmapCompatImpl();
67        } else {
68            IMPL = new BaseBitmapImpl();
69        }
70    }
71
72    public static boolean hasMipMap(Bitmap bitmap) {
73        return IMPL.hasMipMap(bitmap);
74    }
75
76    public static void setHasMipMap(Bitmap bitmap, boolean hasMipMap) {
77        IMPL.setHasMipMap(bitmap, hasMipMap);
78    }
79}