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      1 package com.android.phasebeam;
      2 
      3 import android.app.Service;
      4 import android.graphics.PixelFormat;
      5 import android.os.Bundle;
      6 import android.renderscript.RenderScript;
      7 import android.renderscript.RenderScriptGL;
      8 import android.service.wallpaper.WallpaperService;
      9 import android.util.DisplayMetrics;
     10 import android.view.SurfaceHolder;
     11 import android.view.WindowManager;
     12 
     13 public class PhaseBeamWallpaper extends WallpaperService {
     14 
     15     @Override
     16     public Engine onCreateEngine() {
     17         return new RenderScriptEngine();
     18     }
     19 
     20     private class RenderScriptEngine extends Engine {
     21         private RenderScriptGL mRenderScript = null;
     22         private PhaseBeamRS mWallpaperRS = null;
     23         private int mDensityDPI;
     24 
     25         @Override
     26         public void onCreate(SurfaceHolder surfaceHolder) {
     27             super.onCreate(surfaceHolder);
     28             setTouchEventsEnabled(true);
     29             surfaceHolder.setSizeFromLayout();
     30             surfaceHolder.setFormat(PixelFormat.OPAQUE);
     31 
     32             DisplayMetrics metrics = new DisplayMetrics();
     33             ((WindowManager) getApplication().getSystemService(Service.WINDOW_SERVICE))
     34                     .getDefaultDisplay().getMetrics(metrics);
     35             mDensityDPI = metrics.densityDpi;
     36         }
     37 
     38         @Override
     39         public void onDestroy() {
     40             super.onDestroy();
     41             destroyRenderer();
     42         }
     43 
     44         public void destroyRenderer() {
     45             if (mWallpaperRS != null) {
     46                 mWallpaperRS.stop();
     47                 mWallpaperRS = null;
     48             }
     49 
     50             if (mRenderScript != null) {
     51                 mRenderScript.setSurface(null, 0, 0);
     52                 mRenderScript.destroy();
     53                 mRenderScript = null;
     54             }
     55         }
     56 
     57         @Override
     58         public void onSurfaceCreated(SurfaceHolder surfaceHolder) {
     59             super.onSurfaceCreated(surfaceHolder);
     60 
     61             RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
     62             mRenderScript = new RenderScriptGL(PhaseBeamWallpaper.this, sc);
     63             mRenderScript.setPriority(RenderScript.Priority.NORMAL);
     64         }
     65 
     66         @Override
     67         public void onSurfaceDestroyed(SurfaceHolder surfaceHolder) {
     68             super.onSurfaceDestroyed(surfaceHolder);
     69             destroyRenderer();
     70         }
     71 
     72         @Override
     73         public void onSurfaceChanged(SurfaceHolder surfaceHolder, int format, int width,
     74                 int height) {
     75             super.onSurfaceChanged(surfaceHolder, format, width, height);
     76 
     77             if (mRenderScript != null) {
     78                 mRenderScript.setSurface(surfaceHolder, width, height);
     79             }
     80 
     81             if (mWallpaperRS == null) {
     82                 mWallpaperRS = new PhaseBeamRS();
     83                 mWallpaperRS.init(mDensityDPI, mRenderScript, getResources(), width, height);
     84                 mWallpaperRS.start();
     85             }
     86 
     87             mWallpaperRS.resize(width, height);
     88         }
     89 
     90         @Override
     91         public Bundle onCommand(String action, int x, int y, int z, Bundle extras,
     92                 boolean resultRequested) {
     93             return null;
     94         }
     95 
     96         @Override
     97         public void onVisibilityChanged(boolean visible) {
     98             super.onVisibilityChanged(visible);
     99             if (mWallpaperRS != null) {
    100                 if (visible) {
    101                     mWallpaperRS.start();
    102                 } else {
    103                     mWallpaperRS.stop();
    104                 }
    105             }
    106         }
    107 
    108         @Override
    109         public void onOffsetsChanged(float xOffset, float yOffset, float xOffsetStep,
    110                 float yOffsetStep, int xPixelOffset, int yPixelOffset) {
    111             // TODO: Uncomment this once we can work out framerate issues
    112             //mWallpaperRS.setOffset(xOffset, yOffset, xPixelOffset, yPixelOffset);
    113         }
    114     }
    115 }