| /* |
| * 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.rs.image; |
| |
| import android.app.Activity; |
| import android.os.Bundle; |
| import android.graphics.BitmapFactory; |
| import android.graphics.Bitmap; |
| import android.graphics.Canvas; |
| import android.renderscript.ScriptC; |
| import android.renderscript.RenderScript; |
| import android.renderscript.Type; |
| import android.renderscript.Allocation; |
| import android.renderscript.Element; |
| import android.renderscript.Script; |
| import android.view.SurfaceView; |
| import android.view.SurfaceHolder; |
| import android.widget.ImageView; |
| import android.widget.SeekBar; |
| |
| public class ImageProcessingActivity extends Activity implements SurfaceHolder.Callback { |
| private Bitmap mBitmap; |
| private Params mParams; |
| private Script.Invokable mInvokable; |
| private int[] mOutData; |
| |
| @SuppressWarnings({"FieldCanBeLocal"}) |
| private RenderScript mRS; |
| @SuppressWarnings({"FieldCanBeLocal"}) |
| private Type mParamsType; |
| @SuppressWarnings({"FieldCanBeLocal"}) |
| private Allocation mParamsAllocation; |
| @SuppressWarnings({"FieldCanBeLocal"}) |
| private Type mPixelType; |
| @SuppressWarnings({"FieldCanBeLocal"}) |
| private Allocation mInPixelsAllocation; |
| @SuppressWarnings({"FieldCanBeLocal"}) |
| private Allocation mOutPixelsAllocation; |
| |
| private SurfaceView mSurfaceView; |
| private ImageView mDisplayView; |
| |
| static class Params { |
| public int inWidth; |
| public int outWidth; |
| public int inHeight; |
| public int outHeight; |
| |
| public float threshold; |
| } |
| |
| static class Pixel { |
| public byte a; |
| public byte r; |
| public byte g; |
| public byte b; |
| } |
| |
| class FilterCallback extends RenderScript.RSMessage { |
| private Runnable mAction = new Runnable() { |
| public void run() { |
| mOutPixelsAllocation.readData(mOutData); |
| mBitmap.setPixels(mOutData, 0, mParams.outWidth, 0, 0, |
| mParams.outWidth, mParams.outHeight); |
| mDisplayView.invalidate(); |
| } |
| }; |
| |
| @Override |
| public void run() { |
| mSurfaceView.removeCallbacks(mAction); |
| mSurfaceView.post(mAction); |
| } |
| } |
| |
| @Override |
| protected void onCreate(Bundle savedInstanceState) { |
| super.onCreate(savedInstanceState); |
| setContentView(R.layout.main); |
| |
| mBitmap = loadBitmap(R.drawable.data); |
| |
| mSurfaceView = (SurfaceView) findViewById(R.id.surface); |
| mSurfaceView.getHolder().addCallback(this); |
| |
| mDisplayView = (ImageView) findViewById(R.id.display); |
| mDisplayView.setImageBitmap(mBitmap); |
| |
| ((SeekBar) findViewById(R.id.threshold)).setOnSeekBarChangeListener( |
| new SeekBar.OnSeekBarChangeListener() { |
| public void onProgressChanged(SeekBar seekBar, int progress, boolean fromUser) { |
| if (fromUser) { |
| mParams.threshold = progress / 100.0f; |
| mParamsAllocation.data(mParams); |
| mInvokable.execute(); |
| } |
| } |
| |
| public void onStartTrackingTouch(SeekBar seekBar) { |
| } |
| |
| public void onStopTrackingTouch(SeekBar seekBar) { |
| } |
| }); |
| } |
| |
| public void surfaceCreated(SurfaceHolder holder) { |
| mParams = createParams(); |
| mInvokable = createScript(); |
| |
| mInvokable.execute(); |
| } |
| |
| public void surfaceChanged(SurfaceHolder holder, int format, int width, int height) { |
| } |
| |
| public void surfaceDestroyed(SurfaceHolder holder) { |
| } |
| |
| private Script.Invokable createScript() { |
| mRS = new RenderScript(mSurfaceView.getHolder().getSurface(), false, false); |
| mRS.mMessageCallback = new FilterCallback(); |
| |
| mParamsType = Type.createFromClass(mRS, Params.class, 1, "Parameters"); |
| mParamsAllocation = Allocation.createTyped(mRS, mParamsType); |
| mParamsAllocation.data(mParams); |
| |
| final int pixelCount = mParams.inWidth * mParams.inHeight; |
| |
| mPixelType = Type.createFromClass(mRS, Pixel.class, 1, "Pixel"); |
| mInPixelsAllocation = Allocation.createSized(mRS, Element.USER_I32(mRS), |
| pixelCount); |
| mOutPixelsAllocation = Allocation.createSized(mRS, Element.USER_I32(mRS), |
| pixelCount); |
| |
| final int[] data = new int[pixelCount]; |
| mBitmap.getPixels(data, 0, mParams.inWidth, 0, 0, mParams.inWidth, mParams.inHeight); |
| mInPixelsAllocation.data(data); |
| |
| mOutData = new int[pixelCount]; |
| mOutPixelsAllocation.data(mOutData); |
| |
| ScriptC.Builder sb = new ScriptC.Builder(mRS); |
| sb.setType(mParamsType, "Params", 0); |
| sb.setType(mPixelType, "InPixel", 1); |
| sb.setType(mPixelType, "OutPixel", 2); |
| sb.setType(true, 2); |
| Script.Invokable invokable = sb.addInvokable("main"); |
| sb.setScript(getResources(), R.raw.threshold); |
| sb.setRoot(true); |
| |
| ScriptC script = sb.create(); |
| script.bindAllocation(mParamsAllocation, 0); |
| script.bindAllocation(mInPixelsAllocation, 1); |
| script.bindAllocation(mOutPixelsAllocation, 2); |
| |
| return invokable; |
| } |
| |
| private Params createParams() { |
| final Params params = new Params(); |
| params.inWidth = params.outWidth = mBitmap.getWidth(); |
| params.inHeight = params.outHeight = mBitmap.getHeight(); |
| params.threshold = 0.5f; |
| return params; |
| } |
| |
| private Bitmap loadBitmap(int resource) { |
| final BitmapFactory.Options options = new BitmapFactory.Options(); |
| options.inPreferredConfig = Bitmap.Config.ARGB_8888; |
| return copyBitmap(BitmapFactory.decodeResource(getResources(), resource, options)); |
| } |
| |
| private static Bitmap copyBitmap(Bitmap source) { |
| Bitmap b = Bitmap.createBitmap(source.getWidth(), source.getHeight(), source.getConfig()); |
| Canvas c = new Canvas(b); |
| c.drawBitmap(source, 0, 0, null); |
| source.recycle(); |
| return b; |
| } |
| } |