import numpy as np
from PIL import Image, ImageDraw, ImageFont

def convert_rgb_to_rgb565_numpy(image):
    if image.mode != 'RGB':
        raise ValueError('Image must be in RGB mode')

    # Convert image to NumPy array
    img_array = np.array(image)

    # Extract the individual RGB components
    r = img_array[:,:,0].astype(np.uint16)
    g = img_array[:,:,1].astype(np.uint16)
    b = img_array[:,:,2].astype(np.uint16)

    # Shift the bits into the correct positions for RGB565
#    rgb565_array = ((r & 0xF8) << 8) | ((g & 0xFC) << 3) | (b >> 3)
    # Shift the bits into the correct positions for RGB565 using NumPy's bitwise functions
    rgb565_array = np.bitwise_or(np.bitwise_or(np.left_shift(np.bitwise_and(r, 0xF8), 8), 
                                               np.left_shift(np.bitwise_and(g, 0xFC), 3)), 
                                 np.right_shift(b, 3))

    # Flatten the array to a 1D array of bytes and return
    return rgb565_array.flatten().tobytes()