Package com.jogamp.opencl.gl

Source Code of com.jogamp.opencl.gl.CLGLBuffer

/*
* 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.gl;

import com.jogamp.opencl.CLBuffer;
import com.jogamp.opencl.CLCommandQueue;
import com.jogamp.opencl.CLContext;
import com.jogamp.opencl.CLException;
import com.jogamp.opencl.llb.gl.CLGL;

import java.nio.Buffer;
import javax.media.opengl.GLContext;


/**
* Shared buffer between OpenGL and OpenCL contexts.
* @author Michael Bien
*/
public final class CLGLBuffer<B extends Buffer> extends CLBuffer<B> implements CLGLObject {


    /**
     * The OpenGL object handle.
     */
    public final int GLID;

    private CLGLBuffer(CLContext context, B directBuffer, long id, int glObject, long size, int flags) {
        super(context, directBuffer, size, id, flags);
        this.GLID = glObject;
    }


    static <B extends Buffer> CLGLBuffer<B> create(CLContext context, B directBuffer, long size, int flags, int glObject) {
        checkBuffer(directBuffer, flags);
       
        CLGL clgli = (CLGL)getCL(context);
       
        int[] result = new int[1];
        long id = clgli.clCreateFromGLBuffer(context.ID, flags, glObject, result, 0);
        CLException.checkForError(result[0], "can not create CLGLObject from #"+glObject);

        return new CLGLBuffer<B>(context, directBuffer, id, glObject, size, flags);
    }

    static <B extends Buffer> void checkBuffer(B directBuffer, int flags) throws IllegalArgumentException {
        if (directBuffer != null && !directBuffer.isDirect()) {
            throw new IllegalArgumentException("buffer is not a direct buffer");
        }
        if (isHostPointerFlag(flags)) {
            throw new IllegalArgumentException("CL_MEM_COPY_HOST_PTR or CL_MEM_USE_HOST_PTR can not be used with OpenGL Buffers.");
        }
    }

    /**
     * Updates the size of this CLGLBuffer by querying OpenGL.
     * This method may only be called if this memory object has been acquired by calling
     * {@link CLCommandQueue#putAcquireGLObject(com.jogamp.opencl.gl.CLGLObject)}.
     */
    public void updateSize() {
        size = getSizeImpl(context, ID);
        initCLCapacity();
    }

    @Override
    public int getGLObjectID() {
        return GLID;
    }

    @Override
    public GLObjectType getGLObjectType() {
        return GLObjectType.GL_OBJECT_BUFFER;
    }

    @Override
    public CLGLContext getContext() {
        return (CLGLContext) super.getContext();
    }

    @Override
    public GLContext getGLContext() {
        return getContext().getGLContext();
    }

    @Override
    public <T extends Buffer> CLGLBuffer<T> cloneWith(T directBuffer) {
        return new CLGLBuffer<T>(context, directBuffer, ID, GLID, size, FLAGS);
    }

    @Override
    public String toString() {
        return getClass().getSimpleName()+" [id: " + ID+" glID: "+GLID+"]";
    }

}
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