Example usage for java.nio ByteBuffer position

Introduction

In this page you can find the example usage for java.nio ByteBuffer position.

Prototype

public final Buffer position(int newPosition)

Source Link

Document

Sets the position of this buffer.

Usage

From source file:Main.java

public static ByteBuffer createByteBuffer(byte... bytes) {
    ByteBuffer bb = createByteBuffer(bytes.length).put(bytes);
    bb.position(0);
    return bb;//from  www .ja  v  a  2  s.co  m
}

From source file:Main.java

public static ByteBuffer buildByteBuffer(byte[] array) {
    ByteBuffer byteBuffer = ByteBuffer.allocateDirect(array.length);
    byteBuffer.put(array);/*from   w  ww .j a v  a 2 s.  c  om*/
    byteBuffer.position(0);
    return byteBuffer;
}

From source file:Main.java

/**
 * Make a direct NIO ByteBuffer from an array of floats
 * @param arr The array/* w ww . j a va  2 s. co  m*/
 * @return The newly created FloatBuffer
 */
public static ByteBuffer makeByteBuffer(byte[] arr) {
    ByteBuffer bb = ByteBuffer.allocateDirect(arr.length);
    bb.order(ByteOrder.nativeOrder());
    bb.put(arr);
    bb.position(0);
    return bb;
}

From source file:Main.java

public static ByteBuffer makeByteBuffer(byte[] array) {
    if (array == null)
        throw new IllegalArgumentException();

    ByteBuffer byteBuffer = ByteBuffer.allocateDirect(array.length);
    byteBuffer.order(ByteOrder.nativeOrder());
    byteBuffer.put(array);//from  ww  w .  ja  va  2s .c o  m
    byteBuffer.position(0);
    return byteBuffer;
}

From source file:Main.java

/**
 * Returns the {@code String} instance with detecting the Japanese encoding.
 * @throws UnsupportedEncodingException if it fails to detect the encoding.
 *//* w  w  w.  j  av  a 2 s  . c  om*/
static String toStringWithEncodingDetection(ByteBuffer buffer) throws UnsupportedEncodingException {
    for (String encoding : JAPANESE_ENCODING_LIST) {
        buffer.position(0);
        try {
            Charset charset = Charset.forName(encoding);
            CharBuffer result = charset.newDecoder().onMalformedInput(CodingErrorAction.REPORT)
                    .onUnmappableCharacter(CodingErrorAction.REPORT).decode(buffer);
            String str = result.toString();
            if (str.length() > 0 && str.charAt(0) == 0xFEFF) {
                // Remove leading BOM if necessary.
                str = str.substring(1);
            }
            return str;
        } catch (Exception e) {
            // Ignore exceptions, and retry next encoding.
        }
    }

    throw new UnsupportedEncodingException("Failed to detect encoding");
}

From source file:Main.java

public static ByteBuffer makeByteBuffer(byte[] array) {
    final int SIZE = Byte.SIZE / 8;
    ByteBuffer byteBuffer = ByteBuffer.allocateDirect(array.length * SIZE);
    byteBuffer.order(ByteOrder.nativeOrder());
    byteBuffer.put(array);// w  w  w  . j av a2 s. c o m
    byteBuffer.position(0);
    return byteBuffer;
}

From source file:Main.java

public static ByteBuffer makeByteBuffer(byte[] array)
/*     */ {//from   w  w  w .  j a v  a  2 s . c o  m
    /*  63 */int SIZE = 1;
    /*  64 */ByteBuffer byteBuffer = ByteBuffer.allocateDirect(array.length * 1);
    /*  65 */byteBuffer.order(ByteOrder.nativeOrder());
    /*  66 */byteBuffer.put(array);
    /*  67 */byteBuffer.position(0);
    /*  68 */return byteBuffer;
    /*     */}

From source file:TimedJsonStreamParserTest.java

private static ByteBuffer getJsonByteBuffer(Object obj) throws IOException {
    byte[] bytes = mapper.writeValueAsBytes(obj);
    ByteBuffer buff = ByteBuffer.wrap(bytes);
    buff.position(0);
    return buff;//from  w  w w. j  ava  2 s  .  co  m
}

From source file:Main.java

public static ByteBuffer setupByteBuffer(ByteBuffer preBuffer, byte[] array) {

    if (preBuffer == null || preBuffer.capacity() < array.length) {
        preBuffer = createByteBuffer(array.length * 2);
    } else {//from   ww w  .j  a  v  a  2  s.c om
        preBuffer.clear();
    }
    preBuffer.put(array);
    preBuffer.position(0);
    return preBuffer;
}

From source file:Main.java

public static byte[] makeFontBitmap(String font, String code, int size, float[] arrayOfPos) {
    Canvas c = new Canvas();
    Paint p = new Paint();
    float density = context.getResources().getDisplayMetrics().density;
    //        Log.v(TAG, String.format("makeFontBitmap called(Java): font=%s code=%s density=%f", font, code, density));
    p.setTextSize((float) size * density);
    p.setAntiAlias(true);/*from   w  w  w . j a va2 s . c  o  m*/

    Rect textBounds = new Rect();
    p.getTextBounds(code, 0, code.length(), textBounds);
    //        Log.v(TAG, String.format("makeFontBitmap textBounds: %d,%d,%d,%d", textBounds.left, textBounds.top, textBounds.right, textBounds.bottom));

    Rect textBoundsAxA = new Rect();
    String axa = String.format("A%sA", code);
    p.getTextBounds(axa, 0, axa.length(), textBoundsAxA);
    Rect textBoundsAA = new Rect();
    String aa = "AA";
    p.getTextBounds(aa, 0, aa.length(), textBoundsAA);

    // cache.distDelta = Vec2(0, 0);
    arrayOfPos[0] = textBounds.left;
    arrayOfPos[1] = textBounds.top;

    // cache.srcWidth = Vec2(16, 16);
    arrayOfPos[2] = textBounds.width();
    arrayOfPos[3] = textBounds.height();

    // cache.step = 16;
    //      arrayOfPos[4] = textBounds.width() + 1;
    arrayOfPos[4] = textBoundsAxA.width() - textBoundsAA.width();

    if (textBounds.width() == 0 || textBounds.height() == 0) {
        Log.v(TAG, "makeFontBitmap: empty");
        return null;
    }

    Bitmap b = Bitmap.createBitmap(textBounds.width(), textBounds.height(), Bitmap.Config.ARGB_8888);
    c.setBitmap(b);

    Rect r = new Rect(0, 0, textBounds.width(), textBounds.height());
    //      p.setColor(Color.RED);
    p.setARGB(0, 0, 0, 0);
    c.drawRect(r, p);
    p.setARGB(255, 255, 255, 255);

    //        Log.v(TAG, "makeFontBitmap: drawText");
    c.drawText(code, -textBounds.left, -textBounds.top, p);
    //        Log.v(TAG, String.format("makeFontBitmap: w=%.2f h=%.2f", arrayOfPos[2], arrayOfPos[3]));

    ByteBuffer buf = ByteBuffer.allocate(textBounds.width() * textBounds.height() * 4);
    //        Log.v(TAG, String.format("makeFontBitmap: b.getRowBytes() %d", b.getRowBytes()));
    buf.position(0);
    b.copyPixelsToBuffer(buf);
    //        Log.v(TAG, String.format("makeFontBitmap results: capacity=%d", buf.capacity()));

    return buf.array();
}