esphome/tests/integration/fixtures/sdl_headless_screenshot.yaml

esphome:
  name: sdl-headless-screenshot-test
host:

api:
  actions:
    # The name comes from the test so it can capture more than once while it waits for the first
    # frame: a snapshot never writes over a file that is already there.
    - action: take_screenshot
      variables:
        name: string
      then:
        - snapshot.take:
            id: sdl_display
            filename: !lambda return name;

logger:
  level: DEBUG

display:
  - platform: sdl
    id: sdl_display
    headless: true
    show_test_card: true
    update_interval: 100ms
    # An odd width exercises the row padding in the BMP writer
    dimensions:
      width: 101
      height: 64