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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.app.compat.CompatChanges;
import android.compat.annotation.ChangeId;
import android.compat.annotation.EnabledAfter;
import android.content.res.Resources;
import android.util.Slog;
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.
*
* @deprecated Renderscript has been deprecated in API level 31. Please refer to the <a
* href="https://developer.android.com/guide/topics/renderscript/migration-guide">migration
* guide</a> for the proposed alternatives.
**/
@Deprecated
public class ScriptC extends Script {
private static final String TAG = "ScriptC";
/**
* In targetSdkVersion 36 and above, Renderscript's ScriptC stops being supported
* and an exception is thrown when the class is instantiated.
* In targetSdkVersion 35 and below, Renderscript's ScriptC still works.
*/
@ChangeId
@EnabledAfter(targetSdkVersion = 36)
private static final long RENDERSCRIPT_SCRIPTC_DEPRECATION_CHANGE_ID = 297019750L;
/**
* 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 id
* @param rs
*
*/
protected ScriptC(long 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);
long id = internalCreate(rs, resources, resourceID);
if (id == 0) {
throw new RSRuntimeException("Loading of ScriptC script failed.");
}
setID(id);
}
/**
* Only intended for use by the generated derived classes.
*
* @param rs
*/
protected ScriptC(RenderScript rs, String resName, byte[] bitcode32, byte[] bitcode64) {
super(0, rs);
long id = 0;
if (RenderScript.sPointerSize == 4) {
id = internalStringCreate(rs, resName, bitcode32);
} else {
id = internalStringCreate(rs, resName, bitcode64);
}
if (id == 0) {
throw new RSRuntimeException("Loading of ScriptC script failed.");
}
setID(id);
}
private static void throwExceptionIfScriptCUnsupported() {
// Checks that this device actually does have an ABI that supports ScriptC.
//
// For an explanation as to why `System.loadLibrary` is used, see discussion at
// https://android-review.googlesource.com/c/platform/frameworks/base/+/2957974/comment/2f908b80_a05292ee
try {
System.loadLibrary("RS");
} catch (UnsatisfiedLinkError e) {
String s = "This device does not have an ABI that supports ScriptC.";
throw new UnsupportedOperationException(s);
}
// Throw an exception if the target API is 36 or above
String message =
"ScriptC scripts are not supported when targeting an API Level >= 36. Please refer "
+ "to https://developer.android.com/guide/topics/renderscript/migration-guide "
+ "for proposed alternatives.";
Slog.w(TAG, message);
if (CompatChanges.isChangeEnabled(RENDERSCRIPT_SCRIPTC_DEPRECATION_CHANGE_ID)) {
throw new UnsupportedOperationException(message);
}
}
private static synchronized long internalCreate(RenderScript rs, Resources resources, int resourceID) {
throwExceptionIfScriptCUnsupported();
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);
// Log.v(TAG, "Create script for resource = " + resName);
return rs.nScriptCCreate(resName, RenderScript.getCachePath(), pgm, pgmLength);
}
private static synchronized long internalStringCreate(RenderScript rs, String resName, byte[] bitcode) {
// Log.v(TAG, "Create script for resource = " + resName);
throwExceptionIfScriptCUnsupported();
return rs.nScriptCCreate(resName, RenderScript.getCachePath(), bitcode, bitcode.length);
}
}
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