/**
 * Copyright 2010 JogAmp Community. All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without modification, are
 * permitted provided that the following conditions are met:
 *
 *    1. Redistributions of source code must retain the above copyright notice, this list of
 *       conditions and the following disclaimer.
 *
 *    2. Redistributions in binary form must reproduce the above copyright notice, this list
 *       of conditions and the following disclaimer in the documentation and/or other materials
 *       provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY JogAmp Community ``AS IS'' AND ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
 * FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL JogAmp Community OR
 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * The views and conclusions contained in the software and documentation are those of the
 * authors and should not be interpreted as representing official policies, either expressed
 * or implied, of JogAmp Community.
 */

package jogamp.opengl.util;

import javax.media.opengl.*;

import com.jogamp.opengl.util.*;

import java.nio.*;

/**
 * Used for pure VBO data arrays, i.e. where the buffer data 
 * does not represents a specific array name. 
 */
public class GLDataArrayHandler implements GLArrayHandler {
  private GLArrayDataEditable ad;

  public GLDataArrayHandler(GLArrayDataEditable ad) {
    this.ad = ad;
  }

  public final void setSubArrayVBOName(int vboName) {
      throw new UnsupportedOperationException();
  }
  
  public final void addSubHandler(GLArrayHandlerFlat handler) {
      throw new UnsupportedOperationException();
  }
  
  public final void syncData(GL gl, boolean enable, Object ext) {
    if(!ad.isVBO()) {
        // makes no sense otherwise
        throw new GLException("GLDataArrayHandler can only handle VBOs.");
    }
    if(enable) {
        Buffer buffer = ad.getBuffer();

        // always bind and refresh the VBO mgr, 
        // in case more than one gl*Pointer objects are in use
        gl.glBindBuffer(ad.getVBOTarget(), ad.getVBOName());
        if(!ad.isVBOWritten()) {
            if(null!=buffer) {
                gl.glBufferData(ad.getVBOTarget(), buffer.limit() * ad.getComponentSizeInBytes(), buffer, ad.getVBOUsage());
            }
            ad.setVBOWritten(true);
        }
    } else {
        gl.glBindBuffer(ad.getVBOTarget(), 0);
    }      
  }
  
  public final void enableState(GL gl, boolean enable, Object ext) { 
      // no array association
  }
}