65 lines
2.5 KiB
Java
65 lines
2.5 KiB
Java
/*
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* Copyright (c) 2002 Lightweight Java Game Library Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are
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* met:
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*
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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*
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* * Neither the name of 'Light Weight Java Game Library' nor the names of
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* its contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR
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* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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package org.lwjgl.opengl;
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import java.nio.*;
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/**
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* Simple utility class.
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*
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* @author cix_foo <cix_foo@users.sourceforge.net>
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* @version $Revision$
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*/
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abstract class Util {
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private final static IntBuffer int_buffer = ByteBuffer.allocateDirect(4).order(ByteOrder.nativeOrder()).asIntBuffer();
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/**
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* A helper function which is used to get the byte offset in an arbitrary buffer
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* based on its position
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* @return the position of the buffer, in BYTES
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*/
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static int getOffset(Buffer buffer) {
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if (buffer instanceof FloatBuffer || buffer instanceof IntBuffer)
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return buffer.position() << 2;
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else if (buffer instanceof ShortBuffer || buffer instanceof CharBuffer)
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return buffer.position() << 1;
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else if (buffer instanceof DoubleBuffer || buffer instanceof LongBuffer)
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return buffer.position() << 3;
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else
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return buffer.position();
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}
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static int getGLInteger(int enum) {
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CoreGL11.glGetInteger(enum, int_buffer);
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return int_buffer.get(0);
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}
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}
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