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/*
* Copyright (C) 2008 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 android.renderscript;
import android.content.res.Resources;
import java.io.File;
import java.io.IOException;
import java.io.InputStream;
/**
* The superclass for all user-defined scripts. This is only
* intended to be used by the generated derived classes.
**/
public class ScriptC extends Script {
private static final String TAG = "ScriptC";
/**
* Only intended for use by the generated derived classes.
*
* @param id
* @param rs
*/
protected ScriptC(int id, RenderScript rs) {
super(id, rs);
}
/**
* Only intended for use by the generated derived classes.
*
*
* @param rs
* @param resources
* @param resourceID
*/
protected ScriptC(RenderScript rs, Resources resources, int resourceID) {
super(0, rs);
int id = internalCreate(rs, resources, resourceID);
if (id == 0) {
throw new RSRuntimeException("Loading of ScriptC script failed.");
}
setID(id);
}
/**
* Name of the file that holds the object cache.
*/
private static final String CACHE_PATH = "com.android.renderscript.cache";
static String mCachePath;
private static synchronized int internalCreate(RenderScript rs, Resources resources, int resourceID) {
byte[] pgm;
int pgmLength;
InputStream is = resources.openRawResource(resourceID);
try {
try {
pgm = new byte[1024];
pgmLength = 0;
while(true) {
int bytesLeft = pgm.length - pgmLength;
if (bytesLeft == 0) {
byte[] buf2 = new byte[pgm.length * 2];
System.arraycopy(pgm, 0, buf2, 0, pgm.length);
pgm = buf2;
bytesLeft = pgm.length - pgmLength;
}
int bytesRead = is.read(pgm, pgmLength, bytesLeft);
if (bytesRead <= 0) {
break;
}
pgmLength += bytesRead;
}
} finally {
is.close();
}
} catch(IOException e) {
throw new Resources.NotFoundException();
}
String resName = resources.getResourceEntryName(resourceID);
// Create the RS cache path if we haven't done so already.
if (mCachePath == null) {
File f = new File(rs.mCacheDir, CACHE_PATH);
mCachePath = f.getAbsolutePath();
f.mkdirs();
}
// Log.v(TAG, "Create script for resource = " + resName);
return rs.nScriptCCreate(resName, mCachePath, pgm, pgmLength);
}
}
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