polapizero_04.py 文件源码

def displayImageFileOnLCD(filename):
    print 'displays ', filename
    title = 'Review Mode'
    # resize/dither to screen resolution and send to LCD
    image = Image.open(filename)
    im_width, im_height = image.size
    if im_width < im_height:
        image = image.rotate(90)
    image.thumbnail(S_SIZE, Image.ANTIALIAS)
    image_sized = Image.new('RGB', S_SIZE, (0, 0, 0))
    image_sized.paste(image,((S_SIZE[0] - image.size[0]) / 2, (S_SIZE[1] - image.size[1]) / 2))
    # draw filename
    draw = ImageDraw.Draw(image_sized)
    font = ImageFont.truetype('arial.ttf', 18)
    draw.rectangle([(0, 0), (115, 22)], fill=(255,255,255), outline=(0,0,0))
    draw.text((2, 2), title, fill='black', font=font)
    draw.rectangle([(279, 217), (399, 239)], fill=(255,255,255), outline=(0,0,0))
    draw.text((290, 218), filename, fill='black', font=font)
    # display on LCD
    image_sized = ImageOps.invert(image_sized)
    image_sized = image_sized.convert('1') # convert image to black and white
    lcd.write(image_sized.tobytes())