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      1 /*
      2  * Copyright (C) 2008 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 
     17 package android.renderscript;
     18 
     19 import android.content.Context;
     20 import android.content.res.Resources;
     21 import android.util.Log;
     22 
     23 import java.io.File;
     24 import java.io.IOException;
     25 import java.io.InputStream;
     26 import java.util.Map.Entry;
     27 import java.util.HashMap;
     28 
     29 import java.lang.reflect.Field;
     30 import java.lang.reflect.Modifier;
     31 
     32 /**
     33  * The superclass for all user-defined scripts. This is only
     34  * intended to be used by the generated derived classes.
     35  **/
     36 public class ScriptC extends Script {
     37     private static final String TAG = "ScriptC";
     38 
     39     /**
     40      * Only intended for use by the generated derived classes.
     41      *
     42      * @param id
     43      * @param rs
     44      */
     45     protected ScriptC(int id, RenderScript rs) {
     46         super(id, rs);
     47     }
     48 
     49     /**
     50      * Only intended for use by the generated derived classes.
     51      *
     52      *
     53      * @param rs
     54      * @param resources
     55      * @param resourceID
     56      */
     57     protected ScriptC(RenderScript rs, Resources resources, int resourceID) {
     58         super(0, rs);
     59         int id = internalCreate(rs, resources, resourceID);
     60         if (id == 0) {
     61             throw new RSRuntimeException("Loading of ScriptC script failed.");
     62         }
     63         setID(id);
     64     }
     65 
     66     /**
     67      * Name of the file that holds the object cache.
     68      */
     69     private static final String CACHE_PATH = "com.android.renderscript.cache";
     70 
     71     static String mCachePath;
     72 
     73     private static synchronized int internalCreate(RenderScript rs, Resources resources, int resourceID) {
     74         byte[] pgm;
     75         int pgmLength;
     76         InputStream is = resources.openRawResource(resourceID);
     77         try {
     78             try {
     79                 pgm = new byte[1024];
     80                 pgmLength = 0;
     81                 while(true) {
     82                     int bytesLeft = pgm.length - pgmLength;
     83                     if (bytesLeft == 0) {
     84                         byte[] buf2 = new byte[pgm.length * 2];
     85                         System.arraycopy(pgm, 0, buf2, 0, pgm.length);
     86                         pgm = buf2;
     87                         bytesLeft = pgm.length - pgmLength;
     88                     }
     89                     int bytesRead = is.read(pgm, pgmLength, bytesLeft);
     90                     if (bytesRead <= 0) {
     91                         break;
     92                     }
     93                     pgmLength += bytesRead;
     94                 }
     95             } finally {
     96                 is.close();
     97             }
     98         } catch(IOException e) {
     99             throw new Resources.NotFoundException();
    100         }
    101 
    102         String resName = resources.getResourceEntryName(resourceID);
    103 
    104         // Create the RS cache path if we haven't done so already.
    105         if (mCachePath == null) {
    106             File f = new File(rs.mCacheDir, CACHE_PATH);
    107             mCachePath = f.getAbsolutePath();
    108             f.mkdirs();
    109         }
    110         //        Log.v(TAG, "Create script for resource = " + resName);
    111         return rs.nScriptCCreate(resName, mCachePath, pgm, pgmLength);
    112     }
    113 }
    114