text: # Copyright 2014 The Emscripten Authors.  All rights reserved.
  # Emscripten is available under two separate licenses, the MIT license and the
  # University of Illinois/NCSA Open Source License.  Both these licenses can be
  # found in the LICENSE file.
  
  import os
  import shutil
  
  TAG = 'version_4'
  HASH = '30a7b04652239bccff3cb1fa7cd8ae602791b5f502a96df39585c13ebc4bb2b64ba1598c0d1f5382028d94e04a5ca02185ea06bf7f4b3520f6df4cc253f9dd24'
  
  
  def get(ports, settings, shared):
    if settings.USE_SDL_IMAGE != 2:
      return []
  
    sdl_build = os.path.join(ports.get_build_dir(), 'sdl2')
    assert os.path.exists(sdl_build), 'You must use SDL2 to use SDL2_image'
    ports.fetch_project('sdl2_image', 'https://github.com/emscripten-ports/SDL2_image/archive/' + TAG + '.zip', 'SDL2_image-' + TAG, sha512hash=HASH)
  
    settings.SDL2_IMAGE_FORMATS.sort()
    formats = '-'.join(settings.SDL2_IMAGE_FORMATS)
  
    libname = 'libSDL2_image'
    if formats != '':
      libname += '_' + formats
    libname = ports.get_lib_name(libname)
  
    def create():
      # although we shouldn't really do this and could instead use '-Xclang
      # -isystem' as a kind of 'overlay' as sdl_mixer does,
      # by now people may be relying on headers being pulled in by '-s USE_SDL=2'
      # if sdl_image was built in the past
      shutil.copyfile(os.path.join(ports.get_dir(), 'sdl2_image', 'SDL2_image-' + TAG, 'SDL_image.h'), os.path.join(ports.get_build_dir(), 'sdl2', 'include', 'SDL_image.h'))
      shutil.copyfile(os.path.join(ports.get_dir(), 'sdl2_image', 'SDL2_image-' + TAG, 'SDL_image.h'), os.path.join(ports.get_build_dir(), 'sdl2', 'include', 'SDL2', 'SDL_image.h'))
      srcs = 'IMG.c IMG_bmp.c IMG_gif.c IMG_jpg.c IMG_lbm.c IMG_pcx.c IMG_png.c IMG_pnm.c IMG_tga.c IMG_tif.c IMG_xcf.c IMG_xpm.c IMG_xv.c IMG_webp.c IMG_ImageIO.m'.split(' ')
      commands = []
      o_s = []
      defs = []
  
      for fmt in settings.SDL2_IMAGE_FORMATS:
        defs.append('-DLOAD_' + fmt.upper())
  
      if 'png' in settings.SDL2_IMAGE_FORMATS:
        defs += ['-s', 'USE_LIBPNG=1']
  
      if 'jpg' in settings.SDL2_IMAGE_FORMATS:
        defs += ['-s', 'USE_LIBJPEG=1']
  
      for src in srcs:
        o = os.path.join(ports.get_build_dir(), 'sdl2_image', src + '.o')
        commands.append([shared.PYTHON, shared.EMCC, os.path.join(ports.get_dir(), 'sdl2_image', 'SDL2_image-' + TAG, src), '-O2', '-s', 'USE_SDL=2', '-o', o, '-w'] + defs)
        o_s.append(o)
      shared.safe_ensure_dirs(os.path.dirname(o_s[0]))
      ports.run_commands(commands)
      final = os.path.join(ports.get_build_dir(), 'sdl2_image', libname)
      ports.create_lib(final, o_s)
      return final
  
    return [shared.Cache.get(libname, create, what='port')]
  
  
  def clear(ports, shared):
    shared.Cache.get_path(ports.get_lib_name('libSDL2_image'))
  
  
  def process_dependencies(settings):
    if settings.USE_SDL_IMAGE == 2:
      settings.USE_SDL = 2
    if 'png' in settings.SDL2_IMAGE_FORMATS:
      settings.USE_LIBPNG = 1
    if 'jpg' in settings.SDL2_IMAGE_FORMATS:
      settings.USE_LIBJPEG = 1
  
  
  def process_args(ports, args, settings, shared):
    if settings.USE_SDL_IMAGE == 2:
      get(ports, settings, shared)
    return args
  
  
  def show():
    return 'SDL2_image (USE_SDL_IMAGE=2; zlib license)'
  