Don't let the magic smoke out!

5 files changed, 828 insertions, 0 deletions

diff --git a/src/com/android/magicsmoke/MagicSmoke.java b/src/com/android/magicsmoke/MagicSmoke.java
new file mode 100644
index 0000000..e0ff258
--- /dev/null
+++ b/src/com/android/magicsmoke/MagicSmoke.java
@@ -0,0 +1,26 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.magicsmoke;
+
+public class MagicSmoke extends RenderScriptWallpaper<MagicSmokeRS> {
+
+    @Override
+    protected MagicSmokeRS createScene(int width, int height) {
+        return new MagicSmokeRS(this, width, height);
+    }
+}
+
diff --git a/src/com/android/magicsmoke/MagicSmokeRS.java b/src/com/android/magicsmoke/MagicSmokeRS.java
new file mode 100644
index 0000000..726d128
--- /dev/null
+++ b/src/com/android/magicsmoke/MagicSmokeRS.java
@@ -0,0 +1,363 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.magicsmoke;
+
+import static android.renderscript.ProgramFragment.EnvMode.REPLACE;
+import static android.renderscript.Sampler.Value.LINEAR;
+import static android.renderscript.Sampler.Value.WRAP;
+
+import com.android.magicsmoke.R;
+
+import android.content.Context;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
+import android.graphics.Bitmap;
+import android.graphics.BitmapFactory;
+import android.media.MediaPlayer;
+import android.os.Handler;
+import android.renderscript.Allocation;
+import android.renderscript.Dimension;
+import android.renderscript.Element;
+import android.renderscript.Primitive;
+import android.renderscript.ProgramFragment;
+import android.renderscript.ProgramStore;
+import android.renderscript.ProgramVertex;
+import android.renderscript.Sampler;
+import android.renderscript.ScriptC;
+import android.renderscript.SimpleMesh;
+import android.renderscript.Type;
+import android.renderscript.Element.Builder;
+import android.renderscript.ProgramStore.BlendDstFunc;
+import android.renderscript.ProgramStore.BlendSrcFunc;
+import android.util.Log;
+import android.view.MotionEvent;
+
+import java.util.TimeZone;
+
+class MagicSmokeRS extends RenderScriptScene implements OnSharedPreferenceChangeListener {
+
+    static class WorldState {
+        public float mXOffset;
+        public float mTilt;
+        public int   mPreset;
+        public int   mTextureMask;
+        public int   mRotate;
+        public int   mTextureSwap;
+        public int   mProcessTexture;
+        public int   mBackCol;
+        public int   mLowCol;
+        public int   mHighCol;
+        public float mAlphaMul;
+        public int   mPreMul;
+        public int   mBlendFunc;
+    }
+    WorldState mWorldState = new WorldState();
+    private Type mStateType;
+    private Allocation mState;
+
+    private ProgramStore mPfsBackgroundOne;
+    private ProgramStore mPfsBackgroundSrc;
+    private ProgramFragment mPfBackground;
+    private Sampler mSampler;
+    private Allocation[] mSourceTextures;
+    private Allocation[] mRealTextures;
+    
+    private ProgramVertex mPVBackground;
+    private ProgramVertex.MatrixAllocation mPVAlloc;
+
+    private static final int RSID_STATE = 0;
+    //private static final int RSID_PROGRAMVERTEX = 3;
+    private static final int RSID_NOISESRC1 = 1;
+    private static final int RSID_NOISESRC2 = 2;
+    private static final int RSID_NOISESRC3 = 3;
+    private static final int RSID_NOISESRC4 = 4;
+    private static final int RSID_NOISESRC5 = 5;
+    private static final int RSID_NOISEDST1 = 6;
+    private static final int RSID_NOISEDST2 = 7;
+    private static final int RSID_NOISEDST3 = 8;
+    private static final int RSID_NOISEDST4 = 9;
+    private static final int RSID_NOISEDST5 = 10;
+
+    private Context mContext;
+    private SharedPreferences mSharedPref;
+    
+    static class Preset {
+        Preset(boolean process, int backcol, int locol, int hicol, float mul, int mask,
+                 boolean rot, int blend, boolean texswap, boolean premul) {
+            mProcessTexture = process;
+            mBackColor = backcol;
+            mLowColor = locol;
+            mHighColor = hicol;
+            mAlphaMul = mul;
+            mTextureMask = mask;
+            mRotate = rot;
+            mBlendFunc = blend;
+            mTextureSwap = texswap;
+            mPreMul = premul;
+        }
+        public boolean mProcessTexture;
+        public int mBackColor;
+        public int mLowColor;
+        public int mHighColor;
+        public float mAlphaMul;
+        public int mTextureMask;
+        public boolean mRotate;
+        public int mBlendFunc;
+        public boolean mTextureSwap;
+        public boolean mPreMul;
+    }
+
+    public static final int DEFAULT_PRESET = 4;
+    public static final Preset [] mPreset = new Preset[] {
+        //         proc    back     low       high      alph  mask  rot  blend  swap premul
+        new Preset(true,  0x000000, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, false),
+        new Preset(true,  0x0000ff, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, false),
+        new Preset(true,  0x00ff00, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, false),
+        new Preset(true,  0x00ff00, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, true),
+        new Preset(true,  0x00ff00, 0x00ff00, 0xffffff, 2.5f, 0x1f, true,  0, true, true),
+        new Preset(true,  0x800000, 0xff0000, 0xffffff, 2.5f, 0x1f, true,  0, true,  false),
+        new Preset(false, 0x000000, 0x000000, 0xffffff, 0.0f, 0x1f, true,  0, false, false),
+        new Preset(true,  0x0000ff, 0x00ff00, 0xffff00, 2.0f, 0x1f, true,  0, true,  false),
+        new Preset(true,  0x008000, 0x00ff00, 0xffffff, 2.5f, 0x1f, true,  0, true,  false),
+        new Preset(true,  0x800000, 0xff0000, 0xffffff, 2.5f, 0x1f, true,  0, true, true),
+        new Preset(true,  0x808080, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, true),
+        new Preset(true,  0x0000ff, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, true),
+        new Preset(true,  0x0000ff, 0x00ff00, 0xffff00, 1.5f, 0x1f, false, 0, false, true),
+        new Preset(true,  0x0000ff, 0x00ff00, 0xffff00, 2.0f, 0x1f, true,  0, true, true),
+        new Preset(true,  0x0000ff, 0x00ff00, 0xffff00, 1.5f, 0x1f, true,  0, true, true),
+        new Preset(true,  0x808080, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, false, false),
+        new Preset(true,  0x000000, 0x000000, 0xffffff, 2.0f, 0x0f, true,  0, true, false),
+    };
+    
+    private float mTouchY;
+    
+    MagicSmokeRS(Context context, int width, int height) {
+        super(width, height);
+        mWidth = width;
+        mHeight = height;
+        mWorldState.mTilt = 0;
+        mContext = context;
+        mSharedPref = mContext.getSharedPreferences("magicsmoke", Context.MODE_PRIVATE);
+        makeNewState();
+    }
+
+    public void onSharedPreferenceChanged(SharedPreferences sharedPreferences, String key) {
+
+        makeNewState();
+        mState.data(mWorldState);
+    }
+
+    void makeNewState() {
+        int p = mSharedPref.getInt("preset", DEFAULT_PRESET);
+        if (p >= mPreset.length) {
+            p = 0;
+        }
+        mWorldState.mPreset = p;
+        mWorldState.mTextureMask = mPreset[p].mTextureMask;
+        mWorldState.mRotate = mPreset[p].mRotate ? 1 : 0;
+        mWorldState.mTextureSwap = mPreset[p].mTextureSwap ? 1 : 0;
+        mWorldState.mProcessTexture = mPreset[p].mProcessTexture ? 1 : 0;
+        mWorldState.mBackCol = mPreset[p].mBackColor;
+        mWorldState.mLowCol = mPreset[p].mLowColor;
+        mWorldState.mHighCol = mPreset[p].mHighColor;
+        mWorldState.mAlphaMul = mPreset[p].mAlphaMul;
+        mWorldState.mPreMul = mPreset[p].mPreMul ? 1 : 0;
+        mWorldState.mBlendFunc = mPreset[p].mBlendFunc;
+    }
+    
+    @Override
+    public void resize(int width, int height) {
+        super.resize(width, height);
+        if (mPVAlloc != null) {
+            mPVAlloc.setupProjectionNormalized(width, height);
+        }
+    }
+
+    @Override
+    public void onTouchEvent(MotionEvent event) {
+        switch(event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                mTouchY = event.getY();
+                break;
+            case MotionEvent.ACTION_MOVE:
+                float dy = event.getY() - mTouchY;
+                mTouchY += dy;
+                dy /= 20;
+                dy += mWorldState.mTilt;
+                if (dy > 4) {
+                    dy = 4;
+                } else if (dy < -4) {
+                    dy = -4;
+                }
+                mWorldState.mTilt = dy;
+                mState.data(mWorldState);
+        }
+    }
+    
+    @Override
+    public void setOffset(float xOffset, float yOffset, float xStep, float yStep,
+            int xPixels, int yPixels) {
+        // update our state, then push it to the renderscript
+        mWorldState.mXOffset = xOffset;
+        mState.data(mWorldState);
+    }
+
+    @Override
+    public void stop() {
+        mSharedPref.unregisterOnSharedPreferenceChangeListener(this);
+        super.stop();
+    }
+
+    @Override
+    public void start() {
+        super.start();
+        mSharedPref.registerOnSharedPreferenceChangeListener(this);
+        makeNewState();
+        mState.data(mWorldState);
+    }
+    
+    float alphafactor;
+    Type mTextureType;
+    
+    void loadBitmap(int id, int index, String name, float alphamul, int lowcol, int highcol) {
+        BitmapFactory.Options opts = new BitmapFactory.Options();
+        opts.inPreferredConfig = Bitmap.Config.ARGB_8888;
+        Bitmap in = BitmapFactory.decodeResource(mResources, id, opts);
+
+        int pixels[] = new int[65536];
+        in.getPixels(pixels, 0, 256, 0, 0, 256, 256);
+        mRealTextures[index] = Allocation.createTyped(mRS, mTextureType);
+        mSourceTextures[index] = Allocation.createTyped(mRS, mTextureType);
+        mSourceTextures[index].setName(name+"_src");
+        mSourceTextures[index].data(pixels);
+        mRealTextures[index].setName(name);
+        in.recycle();
+    }
+
+    void loadBitmaps() {
+        alphafactor = 1f;
+        float alphamul = mPreset[mWorldState.mPreset].mAlphaMul;
+        int lowcol = mPreset[mWorldState.mPreset].mLowColor;
+        int highcol = mPreset[mWorldState.mPreset].mHighColor;
+        //Log.i("@@@@", "preset " + mWorldState.mPreset + ", mul: " + alphamul +
+        //        ", colors: " + Integer.toHexString(lowcol) + "/" + Integer.toHexString(highcol));
+        
+        // TODO: using different high and low colors for each layer offers some cool effects too
+        loadBitmap(R.drawable.noise1, 0, "Tnoise1", alphamul, lowcol, highcol);
+        loadBitmap(R.drawable.noise2, 1, "Tnoise2", alphamul, lowcol, highcol);
+        loadBitmap(R.drawable.noise3, 2, "Tnoise3", alphamul, lowcol, highcol);
+        loadBitmap(R.drawable.noise4, 3, "Tnoise4", alphamul, lowcol, highcol);
+        loadBitmap(R.drawable.noise5, 4, "Tnoise5", alphamul, lowcol, highcol);
+    }
+    
+    @Override
+    protected ScriptC createScript() {
+
+        // Create a renderscript type from a java class. The specified name doesn't
+        // really matter; the name by which we refer to the object in RenderScript
+        // will be specified later.
+        mStateType = Type.createFromClass(mRS, WorldState.class, 1, "WorldState");
+        // Create an allocation from the type we just created.
+        mState = Allocation.createTyped(mRS, mStateType);
+        mState.data(mWorldState);
+
+        // First set up the coordinate system and such
+        ProgramVertex.Builder pvb = new ProgramVertex.Builder(mRS, null, null);
+        mPVBackground = pvb.create();
+        mPVBackground.setName("PVBackground");
+        mPVAlloc = new ProgramVertex.MatrixAllocation(mRS);
+        mPVBackground.bindAllocation(mPVAlloc);
+        mPVAlloc.setupProjectionNormalized(mWidth, mHeight);
+
+        mSourceTextures = new Allocation[5];
+        mRealTextures = new Allocation[5];
+        
+        Type.Builder tb = new Type.Builder(mRS, Element.RGBA_8888(mRS));
+        tb.add(Dimension.X, 256);
+        tb.add(Dimension.Y, 256);
+        mTextureType = tb.create();
+        loadBitmaps();
+        
+        Sampler.Builder samplerBuilder = new Sampler.Builder(mRS);
+        samplerBuilder.setMin(LINEAR);
+        samplerBuilder.setMag(LINEAR);
+        samplerBuilder.setWrapS(WRAP);
+        samplerBuilder.setWrapT(WRAP);
+        mSampler = samplerBuilder.create();
+
+        {
+            ProgramFragment.Builder builder = new ProgramFragment.Builder(mRS, null, null);
+            builder.setTexEnable(true, 0);
+            builder.setTexEnvMode(ProgramFragment.EnvMode.MODULATE, 0);
+            mPfBackground = builder.create();
+            mPfBackground.setName("PFBackground");
+            mPfBackground.bindSampler(mSampler, 0);
+        }
+
+        {
+            ProgramStore.Builder builder = new ProgramStore.Builder(mRS, null, null);
+            builder.setDepthFunc(ProgramStore.DepthFunc.EQUAL);
+            builder.setBlendFunc(BlendSrcFunc.ONE, BlendDstFunc.ONE_MINUS_SRC_ALPHA);
+            builder.setDitherEnable(true); // without dithering there is severe banding
+            builder.setDepthMask(false);
+            mPfsBackgroundOne = builder.create();
+            mPfsBackgroundOne.setName("PFSBackgroundOne");
+            builder.setBlendFunc(BlendSrcFunc.SRC_ALPHA, BlendDstFunc.ONE_MINUS_SRC_ALPHA);
+            mPfsBackgroundSrc = builder.create();
+            mPfsBackgroundSrc.setName("PFSBackgroundSrc");
+        }
+
+        // Time to create the script
+        ScriptC.Builder sb = new ScriptC.Builder(mRS);
+        // Specify the name by which to refer to the WorldState object in the
+        // renderscript.
+        sb.setType(mStateType, "State", RSID_STATE);
+        sb.setType(mTextureType, "noisesrc1", RSID_NOISESRC1);
+        sb.setType(mTextureType, "noisedst1", RSID_NOISEDST1);
+        sb.setType(mTextureType, "noisesrc2", RSID_NOISESRC2);
+        sb.setType(mTextureType, "noisedst2", RSID_NOISEDST2);
+        sb.setType(mTextureType, "noisesrc3", RSID_NOISESRC3);
+        sb.setType(mTextureType, "noisedst3", RSID_NOISEDST3);
+        sb.setType(mTextureType, "noisesrc4", RSID_NOISESRC4);
+        sb.setType(mTextureType, "noisedst4", RSID_NOISEDST4);
+        sb.setType(mTextureType, "noisesrc5", RSID_NOISESRC5);
+        sb.setType(mTextureType, "noisedst5", RSID_NOISEDST5);
+        sb.setScript(mResources, R.raw.clouds);
+        sb.setRoot(true);
+
+        ScriptC script = sb.create();
+        script.setClearColor(1.0f, 0.0f, 0.0f, 1.0f);
+        script.setTimeZone(TimeZone.getDefault().getID());
+
+        script.bindAllocation(mState, RSID_STATE);
+        script.bindAllocation(mSourceTextures[0], RSID_NOISESRC1);
+        script.bindAllocation(mRealTextures[0], RSID_NOISEDST1);
+        script.bindAllocation(mSourceTextures[1], RSID_NOISESRC2);
+        script.bindAllocation(mRealTextures[1], RSID_NOISEDST2);
+        script.bindAllocation(mSourceTextures[2], RSID_NOISESRC3);
+        script.bindAllocation(mRealTextures[2], RSID_NOISEDST3);
+        script.bindAllocation(mSourceTextures[3], RSID_NOISESRC4);
+        script.bindAllocation(mRealTextures[3], RSID_NOISEDST4);
+        script.bindAllocation(mSourceTextures[4], RSID_NOISESRC5);
+        script.bindAllocation(mRealTextures[4], RSID_NOISEDST5);
+        //script.bindAllocation(mPVAlloc.mAlloc, RSID_PROGRAMVERTEX);
+
+
+        return script;
+    }
+}
diff --git a/src/com/android/magicsmoke/MagicSmokeSelector.java b/src/com/android/magicsmoke/MagicSmokeSelector.java
new file mode 100644
index 0000000..fbe335d
--- /dev/null
+++ b/src/com/android/magicsmoke/MagicSmokeSelector.java
@@ -0,0 +1,234 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package com.android.magicsmoke;
+
+import android.app.Activity;
+import android.app.WallpaperManager;
+import android.app.WallpaperInfo;
+import android.app.Dialog;
+import android.service.wallpaper.IWallpaperConnection;
+import android.service.wallpaper.IWallpaperService;
+import android.service.wallpaper.IWallpaperEngine;
+import android.service.wallpaper.WallpaperSettingsActivity;
+import android.content.ServiceConnection;
+import android.content.Intent;
+import android.content.Context;
+import android.content.ComponentName;
+import android.content.SharedPreferences;
+import android.content.SharedPreferences.Editor;
+import android.os.RemoteException;
+import android.os.IBinder;
+import android.os.ParcelFileDescriptor;
+import android.os.Bundle;
+import android.view.MotionEvent;
+import android.view.View;
+import android.view.WindowManager;
+import android.view.ViewGroup;
+import android.view.Window;
+import android.view.LayoutInflater;
+import android.util.Log;
+import android.widget.TextView;
+
+public class MagicSmokeSelector extends Activity {
+
+    private static final String LOG_TAG = "MagicSmokeSelector";
+
+    private WallpaperManager mWallpaperManager;
+    private WallpaperConnection mWallpaperConnection;
+
+    private Intent mWallpaperIntent;
+    private SharedPreferences mSharedPref;
+    private int mCurrentPreset;
+
+    @Override
+    protected void onCreate(Bundle savedInstanceState) {
+        super.onCreate(savedInstanceState);
+
+        setContentView(R.layout.selector);
+
+        mWallpaperIntent = new Intent(this, MagicSmoke.class);
+        
+        mWallpaperManager = WallpaperManager.getInstance(this);
+        mWallpaperConnection = new WallpaperConnection(mWallpaperIntent);
+        
+        mSharedPref = getSharedPreferences("magicsmoke", Context.MODE_PRIVATE);
+        mCurrentPreset = mSharedPref.getInt("preset", MagicSmokeRS.DEFAULT_PRESET);
+        if (mCurrentPreset >= MagicSmokeRS.mPreset.length) {
+            mCurrentPreset = 0;
+            updatePrefs();
+        }
+    }
+    
+    // button hook
+    public void setLiveWallpaper(View v) {
+        finish();
+    }
+
+
+    @Override
+    public void onResume() {
+        super.onResume();
+        if (mWallpaperConnection != null && mWallpaperConnection.mEngine != null) {
+            try {
+                mWallpaperConnection.mEngine.setVisibility(true);
+            } catch (RemoteException e) {
+                // Ignore
+            }
+        }
+    }
+    
+    @Override
+    public void onPause() {
+        super.onPause();
+        if (mWallpaperConnection != null && mWallpaperConnection.mEngine != null) {
+            try {
+                mWallpaperConnection.mEngine.setVisibility(false);
+            } catch (RemoteException e) {
+                // Ignore
+            }
+        }
+    }
+
+    @Override
+    public void onAttachedToWindow() {
+        super.onAttachedToWindow();
+
+        if (!mWallpaperConnection.connect()) {
+            mWallpaperConnection = null;
+        }
+    }
+
+    @Override
+    public void onDetachedFromWindow() {
+        super.onDetachedFromWindow();
+        
+        if (mWallpaperConnection != null) {
+            mWallpaperConnection.disconnect();
+        }
+        mWallpaperConnection = null;
+    }
+
+    @Override
+    public boolean onTouchEvent(MotionEvent event) {
+        // TODO: make this conditional on preview mode. Right now we
+        // don't get touch events in preview mode.
+        switch(event.getAction()) {
+            case MotionEvent.ACTION_DOWN:
+                if (mCurrentPreset == 0) {
+                    mCurrentPreset = MagicSmokeRS.mPreset.length - 1;
+                } else {
+                    mCurrentPreset--;
+                }
+                updatePrefs();
+                return true;
+        }
+
+        return super.onTouchEvent(event);
+    }
+    
+    private void updatePrefs() {
+
+        Editor edit = mSharedPref.edit();
+        edit.putInt("preset", mCurrentPreset);
+        edit.commit();
+
+    }
+    
+    class WallpaperConnection extends IWallpaperConnection.Stub implements ServiceConnection {
+        final Intent mIntent;
+        IWallpaperService mService;
+        IWallpaperEngine mEngine;
+        boolean mConnected;
+
+        WallpaperConnection(Intent intent) {
+            mIntent = intent;
+        }
+
+        public boolean connect() {
+            synchronized (this) {
+                if (!bindService(mIntent, this, Context.BIND_AUTO_CREATE)) {
+                    return false;
+                }
+                
+                mConnected = true;
+                return true;
+            }
+        }
+        
+        public void disconnect() {
+            synchronized (this) {
+                mConnected = false;
+                if (mEngine != null) {
+                    try {
+                        mEngine.destroy();
+                    } catch (RemoteException e) {
+                        // Ignore
+                    }
+                    mEngine = null;
+                }
+                unbindService(this);
+                mService = null;
+            }
+        }
+        
+        public void onServiceConnected(ComponentName name, IBinder service) {
+            if (mWallpaperConnection == this) {
+                mService = IWallpaperService.Stub.asInterface(service);
+                try {
+                    final View view = findViewById(R.id.backgroundview);
+                    final View root = view.getRootView();
+                    mService.attach(this, view.getWindowToken(),
+                            WindowManager.LayoutParams.TYPE_APPLICATION_MEDIA_OVERLAY,
+                            true, root.getWidth(), root.getHeight());
+                } catch (RemoteException e) {
+                    Log.w(LOG_TAG, "Failed attaching wallpaper; clearing", e);
+                }
+            }
+        }
+
+        public void onServiceDisconnected(ComponentName name) {
+            mService = null;
+            mEngine = null;
+            if (mWallpaperConnection == this) {
+                Log.w(LOG_TAG, "Wallpaper service gone: " + name);
+            }
+        }
+        
+        public void attachEngine(IWallpaperEngine engine) {
+            synchronized (this) {
+                if (mConnected) {
+                    mEngine = engine;
+                    try {
+                        engine.setVisibility(true);
+                    } catch (RemoteException e) {
+                        // Ignore
+                    }
+                } else {
+                    try {
+                        engine.destroy();
+                    } catch (RemoteException e) {
+                        // Ignore
+                    }
+                }
+            }
+        }
+        
+        public ParcelFileDescriptor setWallpaper(String name) {
+            return null;
+        }
+    }
+}
diff --git a/src/com/android/magicsmoke/RenderScriptScene.java b/src/com/android/magicsmoke/RenderScriptScene.java
new file mode 100644
index 0000000..446e01f
--- /dev/null
+++ b/src/com/android/magicsmoke/RenderScriptScene.java
@@ -0,0 +1,91 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package com.android.magicsmoke;
+
+import android.content.res.Resources;
+import android.renderscript.RenderScript;
+import android.renderscript.ScriptC;
+import android.view.MotionEvent;
+
+public abstract class RenderScriptScene {
+    protected int mWidth;
+    protected int mHeight;
+    protected boolean mPreview;
+    protected Resources mResources;
+    protected RenderScript mRS;
+    protected ScriptC mScript;
+
+    public RenderScriptScene(int width, int height) {
+        mWidth = width;
+        mHeight = height;
+    }
+
+    public void init(RenderScript rs, Resources res, boolean isPreview) {
+        mRS = rs;
+        mResources = res;
+        mPreview = isPreview;
+        mScript = createScript();
+    }
+
+    public boolean isPreview() {
+        return mPreview;
+    }
+
+    public int getWidth() {
+        return mWidth;
+    }
+
+    public int getHeight() {
+        return mHeight;
+    }
+
+    public Resources getResources() {
+        return mResources;
+    }
+
+    public RenderScript getRS() {
+        return mRS;
+    }
+
+    public ScriptC getScript() {
+        return mScript;
+    }
+
+    protected abstract ScriptC createScript();
+
+    public void stop() {
+        mRS.contextBindRootScript(null);
+    }
+
+    public void start() {
+        mRS.contextBindRootScript(mScript);
+    }
+
+    public void resize(int width, int height) {
+        mWidth = width;
+        mHeight = height;
+    }
+
+    @SuppressWarnings({"UnusedDeclaration"})
+    public void setOffset(float xOffset, float yOffset,
+            float xStep, float yStep, int xPixels, int yPixels) {
+    }
+    public void onTouchEvent(MotionEvent event) {
+    }
+
+}
diff --git a/src/com/android/magicsmoke/RenderScriptWallpaper.java b/src/com/android/magicsmoke/RenderScriptWallpaper.java
new file mode 100644
index 0000000..984496d
--- /dev/null
+++ b/src/com/android/magicsmoke/RenderScriptWallpaper.java
@@ -0,0 +1,114 @@
+/*
+ * Copyright (C) 2009 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+
+package com.android.magicsmoke;
+
+import android.service.wallpaper.WallpaperService;
+import android.renderscript.RenderScript;
+import android.util.Log;
+import android.view.MotionEvent;
+import android.view.SurfaceHolder;
+import android.view.Surface;
+
+public abstract class RenderScriptWallpaper<T extends RenderScriptScene> extends WallpaperService {
+    public Engine onCreateEngine() {
+        return new RenderScriptEngine();
+    }
+
+    protected abstract T createScene(int width, int height);
+
+    private class RenderScriptEngine extends Engine {
+        private RenderScript mRs;
+        private T mRenderer;
+
+        @Override
+        public void onCreate(SurfaceHolder surfaceHolder) {
+            super.onCreate(surfaceHolder);
+            setTouchEventsEnabled(true);
+            surfaceHolder.setSizeFromLayout();
+        }
+
+        @Override
+        public void onDestroy() {
+            super.onDestroy();
+            destroyRenderer();
+        }
+
+        private void destroyRenderer() {
+            if (mRenderer != null) {
+                mRenderer.stop();
+                mRenderer = null;
+            }
+            if (mRs != null) {
+                mRs.destroy();
+                mRs = null;
+            }            
+        }
+
+        @Override
+        public void onVisibilityChanged(boolean visible) {
+            super.onVisibilityChanged(visible);
+            if (mRenderer != null) {
+                if (visible) {
+                    mRenderer.start();                
+                } else {
+                    mRenderer.stop();
+                }
+            }
+        }
+
+        @Override
+        public void onSurfaceChanged(SurfaceHolder holder, int format, int width, int height) {
+            super.onSurfaceChanged(holder, format, width, height);
+            if (mRenderer == null) {
+                mRenderer = createScene(width, height);
+                mRenderer.init(mRs, getResources(), isPreview());
+                mRenderer.start();
+            } else {
+                mRenderer.resize(width, height);
+            }
+        }
+
+        @Override
+        public void onTouchEvent(MotionEvent event) {
+            mRenderer.onTouchEvent(event);
+        }
+        
+        @Override
+        public void onOffsetsChanged(float xOffset, float yOffset,
+                float xStep, float yStep, int xPixels, int yPixels) {
+            mRenderer.setOffset(xOffset, yOffset, xStep, yStep, xPixels, yPixels);
+        }
+
+        @Override
+        public void onSurfaceCreated(SurfaceHolder holder) {
+            super.onSurfaceCreated(holder);
+
+            Surface surface = null;
+            while (surface == null) {
+                surface = holder.getSurface();
+            }
+            mRs = new RenderScript(surface, false, false);
+        }
+
+        @Override
+        public void onSurfaceDestroyed(SurfaceHolder holder) {
+            super.onSurfaceDestroyed(holder);
+            destroyRenderer();
+        }
+    }
+}