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 17 package com.android.wallpaper; 18 19 import android.service.wallpaper.WallpaperService; 20 import android.os.Bundle; 21 import android.renderscript.RenderScript; 22 import android.view.SurfaceHolder; 23 import android.view.Surface; 24 25 public abstract class RenderScriptWallpaper<T extends RenderScriptScene> extends WallpaperService { onCreateEngine()26 public Engine onCreateEngine() { 27 return new RenderScriptEngine(); 28 } 29 createScene(int width, int height)30 protected abstract T createScene(int width, int height); 31 32 private class RenderScriptEngine extends Engine { 33 private RenderScript mRs; 34 private T mRenderer; 35 36 @Override onCreate(SurfaceHolder surfaceHolder)37 public void onCreate(SurfaceHolder surfaceHolder) { 38 super.onCreate(surfaceHolder); 39 setTouchEventsEnabled(false); 40 surfaceHolder.setSizeFromLayout(); 41 } 42 43 @Override onDestroy()44 public void onDestroy() { 45 super.onDestroy(); 46 destroyRenderer(); 47 } 48 destroyRenderer()49 private void destroyRenderer() { 50 if (mRenderer != null) { 51 mRenderer.stop(); 52 mRenderer = null; 53 } 54 if (mRs != null) { 55 mRs.destroy(); 56 mRs = null; 57 } 58 } 59 60 @Override onVisibilityChanged(boolean visible)61 public void onVisibilityChanged(boolean visible) { 62 super.onVisibilityChanged(visible); 63 if (mRenderer != null) { 64 if (visible) { 65 mRenderer.start(); 66 } else { 67 mRenderer.stop(); 68 } 69 } 70 } 71 72 @Override onSurfaceChanged(SurfaceHolder holder, int format, int width, int height)73 public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) { 74 super.onSurfaceChanged(holder, format, width, height); 75 if (mRs != null) { 76 mRs.contextSetSurface(width, height, holder.getSurface()); 77 } 78 if (mRenderer == null) { 79 mRenderer = createScene(width, height); 80 mRenderer.init(mRs, getResources(), isPreview()); 81 mRenderer.start(); 82 } else { 83 mRenderer.resize(width, height); 84 } 85 } 86 87 @Override onOffsetsChanged(float xOffset, float yOffset, float xStep, float yStep, int xPixels, int yPixels)88 public void onOffsetsChanged(float xOffset, float yOffset, 89 float xStep, float yStep, int xPixels, int yPixels) { 90 mRenderer.setOffset(xOffset, yOffset, xPixels, yPixels); 91 } 92 93 @Override onSurfaceCreated(SurfaceHolder holder)94 public void onSurfaceCreated(SurfaceHolder holder) { 95 super.onSurfaceCreated(holder); 96 97 Surface surface = null; 98 while (surface == null) { 99 surface = holder.getSurface(); 100 } 101 mRs = new RenderScript(false, false); 102 } 103 104 @Override onSurfaceDestroyed(SurfaceHolder holder)105 public void onSurfaceDestroyed(SurfaceHolder holder) { 106 super.onSurfaceDestroyed(holder); 107 destroyRenderer(); 108 } 109 110 @Override onCommand(String action, int x, int y, int z, Bundle extras, boolean resultRequested)111 public Bundle onCommand(String action, int x, int y, int z, 112 Bundle extras, boolean resultRequested) { 113 return mRenderer.onCommand(action, x, y, z, extras, resultRequested); 114 } 115 116 } 117 } 118