Android Open Source - min3d Color4 Buffer List

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License

The source code is released under:
MIT License
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Java Source Code

package com.min3d.lib.core;
//www  .  j a  va 2s .c om
import com.min3d.lib.vos.Color4;

import java.nio.ByteBuffer;
import java.nio.ByteOrder;


public class Color4BufferList
{
  public static final int PROPERTIES_PER_ELEMENT = 4;
  public static final int BYTES_PER_PROPERTY = 1;

  private ByteBuffer _b;
  private int _numElements;
  
  public Color4BufferList(ByteBuffer $b, int $size)
  {
    _b = ByteBuffer.allocate($b.limit() * BYTES_PER_PROPERTY);
    _b.put($b);
    _numElements = $size;
  }
  
  public Color4BufferList(int $maxElements)
  {
    int numBytes = $maxElements * PROPERTIES_PER_ELEMENT * BYTES_PER_PROPERTY;
    _b = ByteBuffer.allocateDirect(numBytes); 
    _b.order(ByteOrder.nativeOrder());
  }
  
  /**
   * The number of items in the list. 
   */
  public int size()
  {
    return _numElements;
  }
  
  /**
   * The _maximum_ number of items that the list can hold, as defined on instantiation.
   * (Not to be confused with the Buffer's capacity)
   */
  public int capacity()
  {
    return _b.capacity() / PROPERTIES_PER_ELEMENT;
  }
  
  /**
   * Clear object in preparation for garbage collection
   */
  public void clear()
  {
    _b.clear();
  }

  public Color4 getAsColor4(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    return new Color4( _b.get(), _b.get(), _b.get(), _b.get() );
  }
  
  public void putInColor4(int $index, Color4 $color4)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    $color4.r = (short)_b.get();
    $color4.g = (short)_b.get();
    $color4.b = (short)_b.get();
    $color4.a = (short)_b.get();
  }

  public short getPropertyR(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    return (short)_b.get();
  }
  public short getPropertyG(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 1);
    return (short)_b.get();
  }
  public float getPropertyB(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 2);
    return (short)_b.get();
  }
  public float getPropertyA(int $index)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 3);
    return (short)_b.get();
  }
  
  //
  
  public void add(Color4 $c)
  {
    set( _numElements, $c );
    _numElements++;
  }
  
  public void add(short $r, short $g, short $b, short $a)
  {
    set(_numElements, $r, $g, $b, $a);
    _numElements++;
  }
  
  public void set(int $index, Color4 $c)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    _b.put((byte)$c.r);
    _b.put((byte)$c.g);
    _b.put((byte)$c.b);
    _b.put((byte)$c.a);
    
    // Rem, OpenGL takes in color in this order: r,g,b,a -- _not_ a,r,g,b
  }

  public void set(int $index, short $r, short $g, short $b, short $a)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    _b.put((byte)$r);
    _b.put((byte)$g);
    _b.put((byte)$b);
    _b.put((byte)$a);
  }
  
  public void setPropertyR(int $index, short $r)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT);
    _b.put((byte)$r);
  }
  public void setPropertyG(int $index, short $g)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 1);
    _b.put((byte)$g);
  }
  public void setPropertyB(int $index, short $b)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 2);
    _b.put((byte)$b);
  }
  public void setPropertyA(int $index, short $a)
  {
    _b.position($index * PROPERTIES_PER_ELEMENT + 3);
    _b.put((byte)$a);
  }
  
  //
  
  public ByteBuffer buffer()
  {
    return _b;
  }
  
  public Color4BufferList clone()
  {
    _b.position(0);
    Color4BufferList c = new Color4BufferList(_b, size());
    return c;
  }
}
Java Source Code List
