/*
 * 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.llb.CL;
import com.jogamp.opencl.llb.CLImageBinding;
import com.jogamp.opencl.llb.gl.CLGL;
import com.jogamp.opencl.CLContext;
import com.jogamp.opencl.CLException;
import com.jogamp.opencl.CLImage2d;
import com.jogamp.opencl.CLImageFormat;
import com.jogamp.opencl.llb.impl.CLImageFormatImpl;

import java.nio.Buffer;

import com.jogamp.opengl.GLContext;

/**
 * 2D OpenCL image representing an OpenGL renderbuffer.
 * @author Michael Bien, et.al.
 */
public class CLGLImage2d<B extends Buffer> extends CLImage2d<B> implements CLGLObject {

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

    protected CLGLImage2d(final CLContext context, final B directBuffer, final CLImageFormat format, final CLImageInfoAccessor accessor, final int width, final int height, final long id, final int glid, final int flags) {
        super(context, directBuffer, format, accessor, width, height, id, flags);
        this.GLID = glid;
    }

    static <B extends Buffer> CLGLImage2d<B> createFromGLRenderbuffer(final CLContext context, final B directBuffer, final int flags, final int renderbuffer) {

        CLGLBuffer.checkBuffer(directBuffer, flags);

        final CL cl = getCL(context);
        final int[] result = new int[1];
        final CLGL clgli = (CLGL)cl;

        final long id = clgli.clCreateFromGLRenderbuffer(context.ID, flags, renderbuffer, result, 0);
        CLException.checkForError(result[0], "can not create CLGLImage2d from renderbuffer #"+renderbuffer+".");

        return createImage(context, id, directBuffer, renderbuffer, flags);
    }

    static <B extends Buffer> CLGLImage2d<B> createImage(final CLContext context, final long id, final B directBuffer, final int glObject, final int flags) {
        final CLImageInfoAccessor accessor = new CLImageInfoAccessor(getCL(context), id);

        final CLImageFormat format = createUninitializedImageFormat();
        accessor.getInfo(CLImageBinding.CL_IMAGE_FORMAT, CLImageFormatImpl.size(), format.getFormatImpl().getBuffer(), null);

        final int width = (int)accessor.getLong(CLImageBinding.CL_IMAGE_WIDTH);
        final int height = (int)accessor.getLong(CLImageBinding.CL_IMAGE_HEIGHT);

        return new CLGLImage2d<B>(context, directBuffer, format, accessor, width, height, id, glObject, flags);
    }

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

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

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

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

}