find_package(Python3 COMPONENTS Interpreter REQUIRED)
execute_process(
  COMMAND ${Python3_EXECUTABLE} -c "import PIL.features; import fontTools.ttLib; assert PIL.features.check_feature('raqm')"
  RESULT_VARIABLE VAMP_PILLOW_STATUS
  ERROR_QUIET
)
if(NOT VAMP_PILLOW_STATUS EQUAL 0)
  message(FATAL_ERROR "Pico artwork generation requires Pillow with Raqm and fontTools. Install libfribidi0 on Debian/Ubuntu, then run: ${Python3_EXECUTABLE} -m pip install -r ${CMAKE_CURRENT_SOURCE_DIR}/generator/requirements.txt")
endif()

# Zero uses packaged font files; only the Pico embeds this fixed sprite atlas.
function(vamp_add_pico_artwork target)
  set(VAMP_PICO_ARTWORK_BINARY ${CMAKE_CURRENT_BINARY_DIR}/generated/pico/static.p4)
  set(VAMP_PICO_ARTWORK_SOURCE ${CMAKE_CURRENT_BINARY_DIR}/generated/pico/artwork.S)
  add_custom_command(
    OUTPUT ${VAMP_PICO_ARTWORK_BINARY}
    COMMAND ${Python3_EXECUTABLE} -m generator.pico_artwork --static-output ${VAMP_PICO_ARTWORK_BINARY}
    WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}
    DEPENDS
      ${CMAKE_CURRENT_SOURCE_DIR}/generator/pico_artwork.py
      ${CMAKE_CURRENT_SOURCE_DIR}/generator/requirements.txt
      ${CMAKE_CURRENT_SOURCE_DIR}/package/assets/fonts/petaluma/PetalumaScript.otf
    VERBATIM
  )
  configure_file(${CMAKE_CURRENT_SOURCE_DIR}/src/vamp_pico/artwork.S.in ${VAMP_PICO_ARTWORK_SOURCE} @ONLY)
  set_source_files_properties(${VAMP_PICO_ARTWORK_SOURCE} PROPERTIES OBJECT_DEPENDS ${VAMP_PICO_ARTWORK_BINARY})
  target_sources(${target} PRIVATE ${VAMP_PICO_ARTWORK_SOURCE})
endfunction()