# Copyright (c) 2021 Dominic Msters
# 
# This software is released under the MIT License.
# https://opensource.org/licenses/MIT

# Tool Function
function(tool_texture target)
  # Defaults
  set(FILE "" )
  set(FILTER_MIN "")
  set(FILTER_MAG "")
  set(WRAP_X "")
  set(WRAP_Y "")
  set(SCALE "")
  set(CROP_START_X "")
  set(CROP_START_Y "")
  set(CROP_END_X "")
  set(CROP_END_Y "")

  # Parse Args
  foreach(_PAIR IN LISTS ARGN)
    if (_PAIR MATCHES "^([^:]+)=(.*)$")
      set(${CMAKE_MATCH_1} ${CMAKE_MATCH_2})
    else()
      message(FATAL_ERROR "Invalid pair: ${_PAIR}")
    endif()
  endforeach()

  # Check for missing args
  if(NOT DEFINED FILE)
    message(FATAL_ERROR "Missing FILE input")
  endif()
  
  add_custom_target(${target}
    COMMAND ${DAWN_TOOLS_DIR}/texturetool/texturetool.py
      --input="${FILE}"
      --output="${DAWN_ASSETS_BUILD_DIR}/${target}.texture"
      --wrap-x="${WRAP_X}"
      --wrap-y="${WRAP_Y}"
      --filter-min="${FILTER_MIN}"
      --filter-mag="${FILTER_MIN}"
      --scale="${SCALE}"
      --crop-start-x="${CROP_START_X}"
      --crop-start-y="${CROP_START_Y}"
      --crop-end-x="${CROP_END_X}"
      --crop-end-y="${CROP_END_Y}"
    COMMENT "Generating texture ${target} from ${FILE}"
  )
  add_dependencies(dawnassets ${target})
endfunction()