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/*
* Copyright 2009 - 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 com.jogamp.opencl;
import com.jogamp.opencl.CLMemory.Mem;
import java.nio.Buffer;
/**
* A sub buffer of a CLBuffer.
* @author Michael Bien
*/
public class CLSubBuffer<B extends Buffer> extends CLBuffer<B> {
private CLBuffer<B> parent;
private final int offset;
CLSubBuffer(CLBuffer<B> parent, int origin, int size, B directBuffer, long id, int flags) {
super(parent.getContext(), directBuffer, size, id, flags);
this.parent = parent;
this.offset = origin;
}
/**
* Throws an UnsupportedOperationException since creating sub buffers
* from sub buffers is not allowed as of OpenCL 1.1.
*/
@Override
public CLSubBuffer<B> createSubBuffer(int origin, int size, Mem... flags) {
throw new UnsupportedOperationException("creating sub buffers from sub buffers is not allowed.");
}
@Override
public void release() {
parent.onReleaseSubBuffer(this);
super.release();
}
/**
* Returns the parent buffer this buffer was created from.
*/
public CLBuffer<B> getParent() {
return parent;
}
/**
* Returns the offset of this sub buffer to its parent in buffer elements.
*/
public int getOffset() {
int elemSize = buffer==null ? 1 : sizeOfBufferElem(buffer);
return offset/elemSize;
}
/**
* Returns the offset of this sub buffer to its parent in bytes.
*/
public int getCLOffset() {
return offset;
}
/**
* Returns true.
*/
@Override
public boolean isSubBuffer() {
return true;
}
}
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