1/*
2 * Copyright (C) 2009 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 com.android.wallpaper;
18
19import android.service.wallpaper.WallpaperService;
20import android.os.Bundle;
21import android.renderscript.RenderScriptGL;
22import android.renderscript.RenderScript;
23import android.view.SurfaceHolder;
24import android.view.Surface;
25
26public abstract class RenderScriptWallpaper<T extends RenderScriptScene> extends WallpaperService {
27    public Engine onCreateEngine() {
28        return new RenderScriptEngine();
29    }
30
31    protected abstract T createScene(int width, int height);
32
33    private class RenderScriptEngine extends Engine {
34        private RenderScriptGL mRs;
35        private T mRenderer;
36
37        @Override
38        public void onCreate(SurfaceHolder surfaceHolder) {
39            super.onCreate(surfaceHolder);
40            setTouchEventsEnabled(false);
41            surfaceHolder.setSizeFromLayout();
42        }
43
44        @Override
45        public void onDestroy() {
46            super.onDestroy();
47            destroyRenderer();
48        }
49
50        private void destroyRenderer() {
51            if (mRenderer != null) {
52                mRenderer.stop();
53                mRenderer = null;
54            }
55            if (mRs != null) {
56                mRs.destroy();
57                mRs = null;
58            }
59        }
60
61        @Override
62        public void onVisibilityChanged(boolean visible) {
63            super.onVisibilityChanged(visible);
64            if (mRenderer != null) {
65                if (visible) {
66                    mRenderer.start();
67                } else {
68                    mRenderer.stop();
69                }
70            }
71        }
72
73        @Override
74        public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) {
75            super.onSurfaceChanged(holder, format, width, height);
76            if (mRs != null) {
77                mRs.setSurface(holder, width, height);
78            }
79            if (mRenderer == null) {
80                mRenderer = createScene(width, height);
81                mRenderer.init(mRs, getResources(), isPreview());
82                mRenderer.start();
83            } else {
84                mRenderer.resize(width, height);
85            }
86        }
87
88        @Override
89        public void onOffsetsChanged(float xOffset, float yOffset,
90                float xStep, float yStep, int xPixels, int yPixels) {
91            mRenderer.setOffset(xOffset, yOffset, xPixels, yPixels);
92        }
93
94        @Override
95        public void onSurfaceCreated(SurfaceHolder holder) {
96            super.onSurfaceCreated(holder);
97
98            RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
99            mRs = new RenderScriptGL(RenderScriptWallpaper.this, sc);
100            mRs.setPriority(RenderScript.Priority.LOW);
101        }
102
103        @Override
104        public void onSurfaceDestroyed(SurfaceHolder holder) {
105            super.onSurfaceDestroyed(holder);
106            destroyRenderer();
107        }
108
109        @Override
110        public Bundle onCommand(String action, int x, int y, int z,
111                Bundle extras, boolean resultRequested) {
112            return mRenderer.onCommand(action, x, y, z, extras, resultRequested);
113        }
114
115    }
116}
117