create Direct FloatBuffer - Android java.nio

Android examples for java.nio:FloatBuffer

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Description

create Direct FloatBuffer

Demo Code

/*/*www  .java2s.  c  om*/
 * Copyright (C) 2010 Lance Nanek
 *
 * 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 com.book2s;
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
import java.nio.FloatBuffer;

public class Main {
    public static final int BYTES_PER_FLOAT = Float.SIZE / Byte.SIZE;

    public static final FloatBuffer createDirectFloatBuffer(
            final int capacity) {
        return createDirectByteBuffer(capacity * BYTES_PER_FLOAT)
                .asFloatBuffer();
    }

    public static final FloatBuffer createDirectFloatBuffer(
            final int capacity, final FloatBuffer previous) {
        final FloatBuffer created = createDirectFloatBuffer(capacity);

        if (null != previous) {
            previous.flip();
            created.put(previous);
        }

        return created;
    }

    public static final ByteBuffer createDirectByteBuffer(final int capacity) {
        return ByteBuffer.allocateDirect(capacity).order(
                ByteOrder.nativeOrder());
    }

    public static final ByteBuffer createDirectByteBuffer(
            final int capacity, final ByteBuffer previous) {
        final ByteBuffer created = createDirectByteBuffer(capacity);

        if (null != previous) {
            previous.flip();
            created.put(previous);
        }

        return created;
    }
}

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