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      1 /*
      2  * Copyright (C) 2010 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 package com.example.plasma.llvm;
     17 
     18 import android.app.Activity;
     19 import android.os.Bundle;
     20 import android.content.Context;
     21 import android.view.View;
     22 import android.view.Menu;
     23 import android.view.MenuItem;
     24 import android.view.MenuInflater;
     25 import android.graphics.Bitmap;
     26 import android.graphics.Canvas;
     27 import android.graphics.Paint;
     28 
     29 import java.io.InputStream;
     30 import java.io.FileInputStream;
     31 import java.io.FileOutputStream;
     32 import java.io.BufferedOutputStream;
     33 import java.io.IOException;
     34 
     35 import android.content.res.Resources;
     36 
     37 public class Plasma extends Activity
     38 {
     39     /** Called when the activity is first created. */
     40     @Override
     41     public void onCreate(Bundle savedInstanceState)
     42     {
     43         super.onCreate(savedInstanceState);
     44         view = new PlasmaView(this);
     45         setContentView(view);
     46     }
     47 
     48     @Override
     49     public boolean onCreateOptionsMenu(Menu menu) {
     50         MenuInflater inflater = getMenuInflater();
     51         inflater.inflate(R.menu.menu, menu);
     52         return true;
     53     }
     54 
     55     @Override
     56     public boolean onOptionsItemSelected(MenuItem item) {
     57         switch (item.getItemId()) {
     58             case R.id.switch_mode:
     59                 view.switchMode();
     60 
     61                 return true;
     62             default:
     63                 return super.onOptionsItemSelected(item);
     64         }
     65     }
     66 
     67     private PlasmaView view;
     68 
     69     /* load our native library */
     70     static {
     71         System.loadLibrary("plasma");
     72     }
     73 }
     74 
     75 class PlasmaView extends View {
     76     private Bitmap mBitmap;
     77     private long mStartTime;
     78 
     79     /* implementend by libplasma.so */
     80     private static native int nativeRenderPlasma(Bitmap  bitmap, long time_ms, byte[] script, int scriptLength, boolean useLLVM);
     81 
     82     private byte[] pgm;
     83     private int pgmLength;
     84 
     85     private boolean mode = true;
     86     private Paint paint = null;
     87 
     88     public void switchMode() {
     89         mode = !mode;
     90     }
     91 
     92     public PlasmaView(Context context) {
     93         super(context);
     94 
     95         mStartTime = System.currentTimeMillis();
     96 
     97         InputStream is = null;
     98         is = getResources().openRawResource(R.raw.libplasma_portable);
     99         try {
    100             try {
    101                 pgm = new byte[1024];
    102                 pgmLength = 0;
    103                 while(true) {
    104                     int bytesLeft = pgm.length - pgmLength;
    105                     if (bytesLeft == 0) {
    106                         byte[] buf2 = new byte[pgm.length * 2];
    107                         System.arraycopy(pgm, 0, buf2, 0, pgm.length);
    108                         pgm = buf2;
    109                         bytesLeft = pgm.length - pgmLength;
    110                     }
    111                     int bytesRead = is.read(pgm, pgmLength, bytesLeft);
    112                     if (bytesRead <= 0) {
    113                         break;
    114                     }
    115                     pgmLength += bytesRead;
    116                 }
    117             } finally {
    118                 is.close();
    119             }
    120         } catch(IOException e) {
    121             throw new Resources.NotFoundException();
    122         }
    123         paint = new Paint();
    124         paint.setTextSize(40);
    125     }
    126 
    127     @Override protected void onDraw(Canvas canvas) {
    128         if (mBitmap == null || mBitmap.getWidth() != getWidth() || mBitmap.getHeight() != getHeight())
    129             mBitmap = Bitmap.createBitmap(getWidth(), getHeight(), Bitmap.Config.RGB_565);
    130 
    131         int frameRate = nativeRenderPlasma(mBitmap, System.currentTimeMillis() - mStartTime, pgm, pgmLength, mode);
    132         canvas.drawBitmap(mBitmap, 0, 0, null);
    133         canvas.drawText((mode ? "LLVM" : "GCC") + " Frame: " + Integer.toString(frameRate), 100, 100, paint);
    134 
    135         // force a redraw, with a different time-based pattern.
    136         invalidate();
    137     }
    138 }
    139