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
17package android.renderscript;
18
19import android.content.Context;
20import android.content.res.Resources;
21import android.util.Log;
22
23import java.io.File;
24import java.io.IOException;
25import java.io.InputStream;
26import java.util.Map.Entry;
27import java.util.HashMap;
28
29import java.lang.reflect.Field;
30import 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 **/
36public 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