/**
     * Calculate stride value for given primitive type and tuple size.
     *
     * @param gpuType, one of :
     * - GL_UNSIGNED_BYTE
     * - GL_BYTE
     * - GL_UNSIGNED_SHORT
     * - GL_SHORT
     * - GL_UNSIGNED_INT
     * - GL_INT
     * - GL_FLOAT
     * - GL_DOUBLE
     * @param tupleSize number of elements in a tuple
     * @return stride size
     */
    public static int calculateStride(int gpuType, int tupleSize){
        return byteSize(gpuType)*tupleSize;
    }

    /**
     * Get GPU primitive type size in bytes.
     *
     * @param gpuType, one of :
     * - GL_UNSIGNED_BYTE
     * - GL_BYTE
     * - GL_UNSIGNED_SHORT
     * - GL_SHORT
     * - GL_UNSIGNED_INT
     * - GL_INT
     * - GL_FLOAT
     * - GL_DOUBLE
     * @return value size in bytes
     */
    public static int byteSize(final int gpuType){
        switch(gpuType){
            case GL4.GL_UNSIGNED_BYTE :
            case GL4.GL_BYTE :
                return 1;
            case GL4.GL_UNSIGNED_SHORT :
            case GL4.GL_SHORT :
                return 2;
            case GL4.GL_UNSIGNED_INT :
            case GL4.GL_INT :
            case GL4.GL_FLOAT :
                return 4;
            case GL4.GL_DOUBLE :
                return 8;
            default :
                throw new IllegalArgumentException("Unexpected type : "+gpuType);
        }
    }