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.res.Resources;
20
21import java.io.File;
22import java.io.IOException;
23import java.io.InputStream;
24
25/**
26 * The superclass for all user-defined scripts. This is only
27 * intended to be used by the generated derived classes.
28 **/
29public class ScriptC extends Script {
30    private static final String TAG = "ScriptC";
31
32    /**
33     * Only intended for use by the generated derived classes.
34     *
35     * @param id
36     * @param rs
37     */
38    protected ScriptC(int id, RenderScript rs) {
39        super(id, rs);
40    }
41    /**
42     * Only intended for use by the generated derived classes.
43     *
44     * @param id
45     * @param rs
46     *
47     */
48    protected ScriptC(long id, RenderScript rs) {
49        super(id, rs);
50    }
51    /**
52     * Only intended for use by the generated derived classes.
53     *
54     *
55     * @param rs
56     * @param resources
57     * @param resourceID
58     */
59    protected ScriptC(RenderScript rs, Resources resources, int resourceID) {
60        super(0, rs);
61        long id = internalCreate(rs, resources, resourceID);
62        if (id == 0) {
63            throw new RSRuntimeException("Loading of ScriptC script failed.");
64        }
65        setID(id);
66    }
67
68    /**
69     * Only intended for use by the generated derived classes.
70     *
71     * @param rs
72     */
73    protected ScriptC(RenderScript rs, String resName, byte[] bitcode32, byte[] bitcode64) {
74        super(0, rs);
75        long id = 0;
76        if (RenderScript.sPointerSize == 4) {
77            id = internalStringCreate(rs, resName, bitcode32);
78        } else {
79            id = internalStringCreate(rs, resName, bitcode64);
80        }
81        if (id == 0) {
82            throw new RSRuntimeException("Loading of ScriptC script failed.");
83        }
84        setID(id);
85    }
86
87    /**
88     * Name of the file that holds the object cache.
89     */
90    private static final String CACHE_PATH = "com.android.renderscript.cache";
91
92    static String mCachePath;
93
94    private static synchronized long internalCreate(RenderScript rs, Resources resources, int resourceID) {
95        byte[] pgm;
96        int pgmLength;
97        InputStream is = resources.openRawResource(resourceID);
98        try {
99            try {
100                pgm = new byte[1024];
101                pgmLength = 0;
102                while(true) {
103                    int bytesLeft = pgm.length - pgmLength;
104                    if (bytesLeft == 0) {
105                        byte[] buf2 = new byte[pgm.length * 2];
106                        System.arraycopy(pgm, 0, buf2, 0, pgm.length);
107                        pgm = buf2;
108                        bytesLeft = pgm.length - pgmLength;
109                    }
110                    int bytesRead = is.read(pgm, pgmLength, bytesLeft);
111                    if (bytesRead <= 0) {
112                        break;
113                    }
114                    pgmLength += bytesRead;
115                }
116            } finally {
117                is.close();
118            }
119        } catch(IOException e) {
120            throw new Resources.NotFoundException();
121        }
122
123        String resName = resources.getResourceEntryName(resourceID);
124
125        // Create the RS cache path if we haven't done so already.
126        if (mCachePath == null) {
127            File f = new File(rs.mCacheDir, CACHE_PATH);
128            mCachePath = f.getAbsolutePath();
129            f.mkdirs();
130        }
131        //        Log.v(TAG, "Create script for resource = " + resName);
132        return rs.nScriptCCreate(resName, mCachePath, pgm, pgmLength);
133    }
134
135    private static synchronized long internalStringCreate(RenderScript rs, String resName, byte[] bitcode) {
136        // Create the RS cache path if we haven't done so already.
137        if (mCachePath == null) {
138            File f = new File(rs.mCacheDir, CACHE_PATH);
139            mCachePath = f.getAbsolutePath();
140            f.mkdirs();
141        }
142        //        Log.v(TAG, "Create script for resource = " + resName);
143        return rs.nScriptCCreate(resName, mCachePath, bitcode, bitcode.length);
144    }
145
146
147}
148