Image and text sync/flickering problem

1

Hi,
thanks for rpi-rgb-led-matrix :slight_smile:
i’m trying to display an image an text on two 64x64 panels in chain.
i’m using the python bindings.
my problem is, that i cant show both at one time without flickering.
i played with two canvas.
i want to show the image and a clock, so i need update the canvas every second.

def set_image():
image = Image.open(“images/vfb.png”).convert(‘RGB’)
image = image.resize((32, 32), Image.ANTIALIAS)
draw = ImageDraw.Draw(image) # Declare Draw instance before prims
image_canvas.SetImage(image, -8, 16)

def uhr():
    global offscreen_canvas

    fake = matrix.CreateFrameCanvas()
    font = graphics.Font()
    font.LoadFont("fonts/5x8.bdf")
    textColor = graphics.Color(196, 196, 196)
    
    aktuelleZeit = datetime.now()
    fake = matrix.CreateFrameCanvas()
    len1 = graphics.DrawText(fake, font, 0, 0, textColor, aktuelleZeit.strftime('%H:%M:%S'))
    graphics.DrawText(offscreen_canvas, font, matrix.width - 1 - len1, matrix.height - 1, textColor, aktuelleZeit.strftime('%H:%M:%S'

try:
    print("Press CTRL-C to stop.")
  
    set_image()
    image_canvas = matrix.SwapOnVSync(image_canvas)

    while True:
        offscreen_canvas.Clear()
        uhr()
        offscreen_canvas = matrix.SwapOnVSync(offscreen_canvas)
        time.sleep(1)
except KeyboardInterrupt:
    sys.exit(0)

is it possible to show an image and text at the same time?
my i understood the canvas not correct.

Thanks for help.

Greetings Simon

2

Cant get this code to run is it missing library imports?