esphome:
  name: snapshot-display-test
host:

api:
  actions:
    # The name comes from the test so it can ask for several in a row and check what each one
    # does with it.
    - action: take_snapshot
      variables:
        name: string
      then:
        - snapshot.take:
            id: snapshot_display
            filename: !lambda return name;

    - action: take_animation
      variables:
        name: string
      then:
        - snapshot.take:
            id: snapshot_display
            filename: !lambda return name;
            frames: 5
            frame_rate: 20fps

    - action: take_noise_snapshot
      variables:
        name: string
      then:
        - snapshot.take:
            id: noise_display
            filename: !lambda return name;

    # A busy picture needs more compression codes than a GIF dictionary holds, so recording it makes
    # the encoder widen its codes and start the dictionary over.
    - action: take_noise_animation
      variables:
        name: string
      then:
        - snapshot.take:
            id: noise_display
            filename: !lambda return name;
            frames: 3
            frame_rate: 20fps

    # Slow enough that a second request arrives while this one is still recording.
    - action: take_slow_animation
      variables:
        name: string
      then:
        - snapshot.take:
            id: snapshot_display
            filename: !lambda return name;
            frames: 3
            frame_rate: 2fps

logger:
  level: DEBUG

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

  # Every pixel is one of 256 colours picked by a hash of its position, so the picture is
  # effectively random but fits a GIF palette exactly.
  - platform: snapshot
    id: noise_display
    update_interval: 1s
    dimensions:
      width: 200
      height: 150
    lambda: |-
      for (int y = 0; y != it.get_height(); y++) {
        for (int x = 0; x != it.get_width(); x++) {
          uint32_t h = static_cast<uint32_t>(x) * 73856093u ^ static_cast<uint32_t>(y) * 19349663u;
          h ^= h >> 13;
          h *= 0x5bd1e995u;
          h ^= h >> 15;
          uint8_t c = h & 0xFF;
          it.draw_pixel_at(x, y, Color(c & 0xE0, (c << 3) & 0xE0, (c << 6) & 0xC0));
        }
      }