1/*
2 * Copyright (C) 2010 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
17package android.graphics;
18
19import com.android.layoutlib.bridge.impl.DelegateManager;
20import com.android.tools.layoutlib.annotations.LayoutlibDelegate;
21
22import java.awt.Graphics2D;
23
24/**
25 * Delegate implementing the native methods of android.graphics.ColorFilter
26 *
27 * Through the layoutlib_create tool, the original native methods of ColorFilter have been replaced
28 * by calls to methods of the same name in this delegate class.
29 *
30 * This class behaves like the original native implementation, but in Java, keeping previously
31 * native data into its own objects and mapping them to int that are sent back and forth between
32 * it and the original ColorFilter class.
33 *
34 * This also serve as a base class for all ColorFilter delegate classes.
35 *
36 * @see DelegateManager
37 *
38 */
39public abstract class ColorFilter_Delegate {
40
41    // ---- delegate manager ----
42    protected static final DelegateManager<ColorFilter_Delegate> sManager =
43            new DelegateManager<ColorFilter_Delegate>(ColorFilter_Delegate.class);
44
45    // ---- delegate helper data ----
46
47    // ---- delegate data ----
48
49    // ---- Public Helper methods ----
50
51    public static ColorFilter_Delegate getDelegate(long nativeShader) {
52        return sManager.getDelegate(nativeShader);
53    }
54
55    public abstract String getSupportMessage();
56
57    public boolean isSupported() {
58        return false;
59    }
60
61    public void applyFilter(Graphics2D g, int width, int height) {
62        // This should never be called directly. If supported, the sub class should override this.
63        assert false;
64    }
65
66    // ---- native methods ----
67
68    @LayoutlibDelegate
69    /*package*/ static void nSafeUnref(long native_instance) {
70        sManager.removeJavaReferenceFor(native_instance);
71    }
72
73    // ---- Private delegate/helper methods ----
74}
75