Examples with ShortBuffer java.nio.ShortBuffer used on opensource projects

Example 26 with ShortBuffer

use of java.nio.ShortBuffer in project UltimateAndroid by cymcsg.

the class TextureUtils method toShortBuffer.

public static ShortBuffer toShortBuffer(short[] v) {
    ByteBuffer buf = ByteBuffer.allocateDirect(v.length * 2);
    buf.order(ByteOrder.nativeOrder());
    ShortBuffer buffer = buf.asShortBuffer();
    buffer.put(v);
    buffer.position(0);
    return buffer;
}

Example 27 with ShortBuffer

use of java.nio.ShortBuffer in project android_frameworks_base by DirtyUnicorns.

the class DhcpPacket method checksum.

/**
     * Performs an IP checksum (used in IP header and across UDP
     * payload) on the specified portion of a ByteBuffer.  The seed
     * allows the checksum to commence with a specified value.
     */
private int checksum(ByteBuffer buf, int seed, int start, int end) {
    int sum = seed;
    int bufPosition = buf.position();
    // set position of original ByteBuffer, so that the ShortBuffer
    // will be correctly initialized
    buf.position(start);
    ShortBuffer shortBuf = buf.asShortBuffer();
    // re-set ByteBuffer position
    buf.position(bufPosition);
    short[] shortArray = new short[(end - start) / 2];
    shortBuf.get(shortArray);
    for (short s : shortArray) {
        sum += intAbs(s);
    }
    start += shortArray.length * 2;
    // see if a singleton byte remains
    if (end != start) {
        short b = buf.get(start);
        // make it unsigned
        if (b < 0) {
            b += 256;
        }
        sum += b * 256;
    }
    sum = ((sum >> 16) & 0xFFFF) + (sum & 0xFFFF);
    sum = ((sum + ((sum >> 16) & 0xFFFF)) & 0xFFFF);
    int negated = ~sum;
    return intAbs((short) negated);
}

Example 28 with ShortBuffer

use of java.nio.ShortBuffer in project jmonkeyengine by jMonkeyEngine.

the class LodGenerator method makeLod.

private VertexBuffer makeLod(Mesh mesh) {
    VertexBuffer indexBuffer = mesh.getBuffer(VertexBuffer.Type.Index);
    boolean isShortBuffer = indexBuffer.getFormat() == VertexBuffer.Format.UnsignedShort;
    // Create buffers.	
    VertexBuffer lodBuffer = new VertexBuffer(VertexBuffer.Type.Index);
    int bufsize = indexCount == 0 ? 3 : indexCount;
    if (isShortBuffer) {
        lodBuffer.setupData(VertexBuffer.Usage.Static, 3, VertexBuffer.Format.UnsignedShort, BufferUtils.createShortBuffer(bufsize));
    } else {
        lodBuffer.setupData(VertexBuffer.Usage.Static, 3, VertexBuffer.Format.UnsignedInt, BufferUtils.createIntBuffer(bufsize));
    }
    lodBuffer.getData().rewind();
    //Check if we should fill it with a "dummy" triangle.
    if (indexCount == 0) {
        if (isShortBuffer) {
            for (int m = 0; m < 3; m++) {
                ((ShortBuffer) lodBuffer.getData()).put((short) 0);
            }
        } else {
            for (int m = 0; m < 3; m++) {
                ((IntBuffer) lodBuffer.getData()).put(0);
            }
        }
    }
    // Fill buffers.       
    Buffer buf = lodBuffer.getData();
    buf.rewind();
    for (Triangle triangle : triangleList) {
        if (!triangle.isRemoved) {
            //    assert (indexCount != 0);
            if (isShortBuffer) {
                for (int m = 0; m < 3; m++) {
                    ((ShortBuffer) buf).put((short) triangle.vertexId[m]);
                }
            } else {
                for (int m = 0; m < 3; m++) {
                    ((IntBuffer) buf).put(triangle.vertexId[m]);
                }
            }
        }
    }
    buf.clear();
    lodBuffer.updateData(buf);
    return lodBuffer;
}

Example 29 with ShortBuffer

use of java.nio.ShortBuffer in project android_frameworks_base by AOSPA.

the class GLLogWrapper method toByteBuffer.

private ByteBuffer toByteBuffer(int byteCount, Buffer input) {
    ByteBuffer result = null;
    boolean convertWholeBuffer = (byteCount < 0);
    if (input instanceof ByteBuffer) {
        ByteBuffer input2 = (ByteBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = input2.limit() - position;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        for (int i = 0; i < byteCount; i++) {
            result.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof CharBuffer) {
        CharBuffer input2 = (CharBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 2;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        CharBuffer result2 = result.asCharBuffer();
        for (int i = 0; i < byteCount / 2; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof ShortBuffer) {
        ShortBuffer input2 = (ShortBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 2;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        ShortBuffer result2 = result.asShortBuffer();
        for (int i = 0; i < byteCount / 2; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof IntBuffer) {
        IntBuffer input2 = (IntBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 4;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        IntBuffer result2 = result.asIntBuffer();
        for (int i = 0; i < byteCount / 4; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof FloatBuffer) {
        FloatBuffer input2 = (FloatBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 4;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        FloatBuffer result2 = result.asFloatBuffer();
        for (int i = 0; i < byteCount / 4; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof DoubleBuffer) {
        DoubleBuffer input2 = (DoubleBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 8;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        DoubleBuffer result2 = result.asDoubleBuffer();
        for (int i = 0; i < byteCount / 8; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else if (input instanceof LongBuffer) {
        LongBuffer input2 = (LongBuffer) input;
        int position = input2.position();
        if (convertWholeBuffer) {
            byteCount = (input2.limit() - position) * 8;
        }
        result = ByteBuffer.allocate(byteCount).order(input2.order());
        LongBuffer result2 = result.asLongBuffer();
        for (int i = 0; i < byteCount / 8; i++) {
            result2.put(input2.get());
        }
        input2.position(position);
    } else {
        throw new RuntimeException("Unimplemented Buffer subclass.");
    }
    result.rewind();
    // The OpenGL API will interpret the result in hardware byte order,
    // so we better do that as well:
    result.order(ByteOrder.nativeOrder());
    return result;
}

Example 30 with ShortBuffer

use of java.nio.ShortBuffer in project geode by apache.

the class ByteSourceJUnitTest method testGetShortInt.

@Test
public void testGetShortInt() {
    ByteBuffer bb = ByteBuffer.allocate(10);
    ShortBuffer sb = bb.asShortBuffer();
    sb.put((short) 0x1110);
    sb.put((short) 0x2220);
    sb.put((short) 0x3330);
    sb.put((short) 0x4440);
    sb.put((short) 0x5550);
    byte[] bytes = bb.array();
    ByteSource bs = createByteSource(bytes);
    bs.position(3);
    short s = bs.getShort(0);
    assertEquals(0x1110, s);
    assertEquals(3, bs.position());
    s = bs.getShort(2);
    assertEquals(0x2220, s);
    assertEquals(3, bs.position());
    s = bs.getShort(8);
    assertEquals(0x5550, s);
    assertEquals(3, bs.position());
    try {
        bs.getShort(9);
        fail("expected IndexOutOfBoundsException");
    } catch (IndexOutOfBoundsException expected) {
    }
}