Android example source code file (ScriptC.java)

This example Android source code file (ScriptC.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Android by Example" ^TM.

Java - Android tags/keywords

android, builder, content, entry, field, hashmap, illegalaccessexception, inputstream, io, ioexception, object, reflection, renderscript, runtimeexception, scriptc, string, tag, utf-8, util, utilities

The ScriptC.java Android example source code

/*
 * 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 android.util.Log;

import java.io.IOException;
import java.io.InputStream;
import java.util.Map.Entry;
import java.util.HashMap;

import java.lang.reflect.Field;
import java.lang.reflect.Modifier;

/**
 * @hide
 **/
public class ScriptC extends Script {
    private static final String TAG = "ScriptC";

    ScriptC(int id, RenderScript rs) {
        super(id, rs);
    }

    public static class Builder extends Script.Builder {
        byte[] mProgram;
        int mProgramLength;
        HashMap<String,Integer> mIntDefines = new HashMap();
        HashMap<String,Float> mFloatDefines = new HashMap();

        public Builder(RenderScript rs) {
            super(rs);
        }

        public void setScript(String s) {
            try {
                mProgram = s.getBytes("UTF-8");
                mProgramLength = mProgram.length;
            } catch (java.io.UnsupportedEncodingException e) {
                throw new RuntimeException(e);
            }
        }

        public void setScript(Resources resources, int id) {
            InputStream is = resources.openRawResource(id);
            try {
                try {
                    setScript(is);
                } finally {
                    is.close();
                }
            } catch(IOException e) {
                throw new Resources.NotFoundException();
            }
        }

        public void setScript(InputStream is) throws IOException {
            byte[] buf = new byte[1024];
            int currentPos = 0;
            while(true) {
                int bytesLeft = buf.length - currentPos;
                if (bytesLeft == 0) {
                    byte[] buf2 = new byte[buf.length * 2];
                    System.arraycopy(buf, 0, buf2, 0, buf.length);
                    buf = buf2;
                    bytesLeft = buf.length - currentPos;
                }
                int bytesRead = is.read(buf, currentPos, bytesLeft);
                if (bytesRead <= 0) {
                    break;
                }
                currentPos += bytesRead;
            }
            mProgram = buf;
            mProgramLength = currentPos;
        }

        static synchronized ScriptC internalCreate(Builder b) {
            b.mRS.nScriptCBegin();
            b.transferCreate();

            for (Entry<String,Integer> e: b.mIntDefines.entrySet()) {
                b.mRS.nScriptCAddDefineI32(e.getKey(), e.getValue().intValue());
            }
            for (Entry<String,Float> e: b.mFloatDefines.entrySet()) {
                b.mRS.nScriptCAddDefineF(e.getKey(), e.getValue().floatValue());
            }

            b.mRS.nScriptCSetScript(b.mProgram, 0, b.mProgramLength);

            int id = b.mRS.nScriptCCreate();
            ScriptC obj = new ScriptC(id, b.mRS);
            b.transferObject(obj);

            return obj;
        }

        public void addDefine(String name, int value) {
            mIntDefines.put(name, value);
        }

        public void addDefine(String name, float value) {
            mFloatDefines.put(name, value);
        }

        /**
         * Takes the all public static final fields for a class, and adds defines
         * for them, using the name of the field as the name of the define.
         */
        public void addDefines(Class cl) {
            addDefines(cl.getFields(), (Modifier.STATIC | Modifier.FINAL | Modifier.PUBLIC), null);
        }

        /**
         * Takes the all public fields for an object, and adds defines
         * for them, using the name of the field as the name of the define.
         */
        public void addDefines(Object o) {
            addDefines(o.getClass().getFields(), Modifier.PUBLIC, o);
        }

        void addDefines(Field[] fields, int mask, Object o) {
            for (Field f: fields) {
                try {
                    if ((f.getModifiers() & mask) == mask) {
                        Class t = f.getType();
                        if (t == int.class) {
                            mIntDefines.put(f.getName(), f.getInt(o));
                        }
                        else if (t == float.class) {
                            mFloatDefines.put(f.getName(), f.getFloat(o));
                        }
                    }
                } catch (IllegalAccessException ex) {
                    // TODO: Do we want this log?
                    Log.d(TAG, "addDefines skipping field " + f.getName());
                }
            }
        }

        public ScriptC create() {
            return internalCreate(this);
        }
    }
}