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package com.android.noisefield;
import android.app.Service;
import android.graphics.PixelFormat;
import android.os.Bundle;
import android.renderscript.RenderScript;
import android.renderscript.RenderScriptGL;
import android.service.wallpaper.WallpaperService;
import android.service.wallpaper.WallpaperService.Engine;
import android.util.DisplayMetrics;
import android.view.SurfaceHolder;
import android.view.WindowManager;
import android.util.Log;
import android.view.MotionEvent;
public class NoiseFieldWallpaper extends WallpaperService {
@Override
public Engine onCreateEngine() {
return new RenderScriptEngine();
}
private class RenderScriptEngine extends Engine {
private RenderScriptGL mRenderScript = null;
private NoiseFieldRS mWallpaperRS = null;
private int mDensityDPI;
@Override
public void onCreate(SurfaceHolder surfaceHolder) {
super.onCreate(surfaceHolder);
setTouchEventsEnabled(true);
surfaceHolder.setSizeFromLayout();
surfaceHolder.setFormat(PixelFormat.RGB_888);
DisplayMetrics metrics = new DisplayMetrics();
((WindowManager) getApplication().getSystemService(Service.WINDOW_SERVICE))
.getDefaultDisplay().getMetrics(metrics);
mDensityDPI = metrics.densityDpi;
}
@Override
public void onDestroy() {
super.onDestroy();
destroyRenderer();
}
public void destroyRenderer() {
if (mWallpaperRS != null) {
mWallpaperRS.stop();
mWallpaperRS = null;
}
if (mRenderScript != null) {
mRenderScript.setSurface(null, 0, 0);
mRenderScript.destroy();
mRenderScript = null;
}
}
@Override
public void onSurfaceCreated(SurfaceHolder surfaceHolder) {
super.onSurfaceCreated(surfaceHolder);
RenderScriptGL.SurfaceConfig sc = new RenderScriptGL.SurfaceConfig();
mRenderScript = new RenderScriptGL(NoiseFieldWallpaper.this, sc);
mRenderScript.setPriority(RenderScript.Priority.LOW);
}
@Override
public void onSurfaceDestroyed(SurfaceHolder surfaceHolder) {
super.onSurfaceDestroyed(surfaceHolder);
destroyRenderer();
}
@Override
public void onSurfaceChanged(SurfaceHolder surfaceHolder,
int format,
int width,
int height) {
super.onSurfaceChanged(surfaceHolder, format, width, height);
if (mRenderScript != null) {
mRenderScript.setSurface(surfaceHolder, width, height);
}
if (mWallpaperRS == null) {
mWallpaperRS = new NoiseFieldRS();
mWallpaperRS.init(mDensityDPI, mRenderScript, getResources(), width, height);
mWallpaperRS.start();
}
mWallpaperRS.resize(width, height);
}
@Override
public void onTouchEvent(MotionEvent ev) {
super.onTouchEvent(ev);
mWallpaperRS.onTouchEvent(ev);
}
@Override
public void onVisibilityChanged(boolean visible) {
super.onVisibilityChanged(visible);
if (mWallpaperRS != null) {
if (visible) {
mWallpaperRS.start();
} else {
mWallpaperRS.stop();
}
}
}
}
}
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