esphome:
  name: lvgl-headless-render-test
host:

api:
  actions:
    # The name comes from the test so it can capture more than once: a snapshot never writes over
    # a file that is already there, so a fixed name could only ever be captured once.
    - action: take_screenshot
      variables:
        name: string
      then:
        - snapshot.take:
            id: lvgl_display
            filename: !lambda return name;

logger:
  level: DEBUG

display:
  # A display with no screen, so what LVGL draws depends on LVGL alone - nothing about the machine
  # running the test, and no graphics library outside this repository, can move the result.
  - platform: snapshot
    id: lvgl_display
    auto_clear_enabled: false
    dimensions:
      width: 300
      height: 300

# The widgets are spelled out here rather than left to the built in "Hello World" screen, which
# LVGL builds when nothing is configured: that screen contains a spinner, and an animation cannot
# produce the same picture twice.
#
# Everything that affects the rendered pixels is set explicitly, so the expected hash in the test
# depends only on the drawing code and the built in font. In particular the background comes from a
# full screen object rather than from the theme, so adjusting a theme default does not break this.
lvgl:
  displays: lvgl_display
  default_font: montserrat_14
  widgets:
    - obj:
        width: 100%
        height: 100%
        bg_color: 0x000080
        bg_opa: cover
        border_width: 0
        radius: 0
        pad_all: 0
        widgets:
          - label:
              align: center
              text: "Hello World!"
              text_color: 0xFFFFFF