code.py

import io
import os
import ssl
import time

import displayio
import adafruit_requests
import board
import jpegio
import socketpool
import wifi

class ResponseStreamAdapter(io.IOBase):
    def __init__(self, response):
        self._response = response

    def readinto(self, buf):
        result = self._response._readinto(buf)
        return result

t0 = time.monotonic_ns()
def tprint(msg):
    t1 = time.monotonic_ns()
    ms = (t1 - t0) // 1_000_000
    s = ms // 1000
    ms = ms % 1000
    print(f"{s:+4d}.{ms:04d}: {msg}")

tprint("connecting to wifi")
wifi.radio.connect(os.getenv("WIFI_SSID"), os.getenv("WIFI_PASSWORD"))

pool = socketpool.SocketPool(wifi.radio)
requests = adafruit_requests.Session(pool, ssl.create_default_context())


# image_url = "https://cdn-shop.adafruit.com/970x728/5843-05.jpg"
image_url = "https://timeguy.com/images/avatar.jpg"

j = jpegio.JpegDecoder()
tprint("fetching image")
r = requests.get(image_url)
tprint(f"status {r.status_code}")
if r.status_code == 200:
    stream = ResponseStreamAdapter(r)
    w, h = j.open(stream)
    tprint(f"Image size is {w}x{h}")

    tprint("Decoding image")
    b = displayio.Bitmap(w, h, 65535)
    j.decode(b)
    tprint("Decoding complete")

    gr = displayio.Group()
    tg = displayio.TileGrid(
        b,
        pixel_shader=displayio.ColorConverter(
            input_colorspace=displayio.Colorspace.RGB565_SWAPPED
        ),
    )
    gr.append(tg)
    board.DISPLAY.root_group = gr

    while True:
        pass
else:
    print(r.status_code)